diff --git a/make.sh b/make.sh
index 0061a75..f273625 100644
--- a/make.sh
+++ b/make.sh
@@ -5,5 +5,4 @@ gcc `find src/ -name '*.c'` \
 	submodules/utilitiec/build/lib/liballocator-interface.a \
 	submodules/utilitiec/build/lib/libStringView.a \
 	submodules/utilitiec/build/lib/libScratchpad.a \
-	-Isubmodules/utilitiec/src \
 	-lm -ggdb -Wall -Wextra -pedantic -o bin/flup
diff --git a/src/builtin-functions.c b/src/builtin-functions.c
index adb3f0e..119e75b 100644
--- a/src/builtin-functions.c
+++ b/src/builtin-functions.c
@@ -23,7 +23,6 @@
 
 #include <stdlib.h>
 #include <stdio.h>
-#include <inttypes.h>
 
 int BuiltinFunction_Equality(CallFrame* top_frame)
 {
@@ -78,39 +77,6 @@ int BuiltinFunction_Plus(CallFrame* top_frame)
 	return CallFrame_StackPush(top_frame, &result);
 }
 
-int BuiltinFunction_Multiply(CallFrame* top_frame)
-{
-	Value v1;
-	Value v2;
-
-	CallFrame_StackPop(top_frame, &v1);
-	if (CallFrame_StackPop(top_frame, &v2) != EXIT_SUCCESS) {
-		// TODO: Error message
-		return EXIT_FAILURE;
-	}
-	if (v1.type != v2.type) {
-		// TODO: Error message
-		return EXIT_FAILURE;
-	}
-
-	Value result;
-	result.type = v1.type;
-	switch (v1.type) {
-		case VALUETYPE_INT64:
-			result.get.i64 = v2.get.i64 * v1.get.i64;
-			break;
-		case VALUETYPE_DOUBLE:
-			result.get.f64 = v2.get.f64 * v1.get.f64;
-			break;
-		case VALUETYPE_BOOLEAN:
-			result.get.boolean = v2.get.boolean * v1.get.boolean;
-			break;
-	}
-
-	top_frame->instruction_pointer++;
-	return CallFrame_StackPush(top_frame, &result);
-}
-
 int BuiltinFunction_Minus(CallFrame* top_frame)
 {
 	Value v1;
@@ -155,7 +121,7 @@ int BuiltinFunction_PrintLine(CallFrame* top_frame)
 
 	switch (v1.type) {
 		case VALUETYPE_INT64:
-			printf("%" PRIi64 "\n", v1.get.i64);
+			printf("%i\n", v1.get.i64);
 			break;
 		case VALUETYPE_DOUBLE:
 			printf("%f\n", v1.get.f64);
diff --git a/src/builtin-functions.h b/src/builtin-functions.h
index fb919a0..cd690a3 100644
--- a/src/builtin-functions.h
+++ b/src/builtin-functions.h
@@ -26,10 +26,9 @@
 
 int BuiltinFunction_Minus(CallFrame* top_frame);
 int BuiltinFunction_Plus(CallFrame* top_frame);
-int BuiltinFunction_Multiply(CallFrame* top_frame);
 int BuiltinFunction_Equality(CallFrame* top_frame);
 int BuiltinFunction_PrintLine(CallFrame* top_frame);
 int BuiltinFunction_Duplicate(CallFrame* top_frame);
 
 
-#endif
+#endif
\ No newline at end of file
diff --git a/src/interpreter.c b/src/interpreter.c
index d8c9d01..1630364 100644
--- a/src/interpreter.c
+++ b/src/interpreter.c
@@ -360,11 +360,6 @@ int Interpreter_ExecuteNext(Interpreter* self, size_t stop_token)
 			BuiltinFunction_Minus(top_frame);
 			break;
 		}
-		case TOKENTYPE_MULTIPLY:
-		{
-			BuiltinFunction_Multiply(top_frame);
-			break;
-		}
 
 		case TOKENTYPE_BIND:
 		{
@@ -483,6 +478,7 @@ int Interpreter_ExecuteNext(Interpreter* self, size_t stop_token)
 		case TOKENTYPE_LEFT_BRACE:
 		case TOKENTYPE_RIGHT_BRACE:
 		case TOKENTYPE_AMPERSAND:
+		case TOKENTYPE_MULTIPLY:
 		case TOKENTYPE_DIVIDE:
 		case TOKENTYPE_ARROW:
 		case TOKENTYPE_COLON:
@@ -494,7 +490,7 @@ int Interpreter_ExecuteNext(Interpreter* self, size_t stop_token)
 		case TOKENTYPE_COMMA:
 		case TOKENTYPE_LEFT_PAREN:
 		case TOKENTYPE_RIGHT_PAREN:
-			fprintf(stderr, "Unexpected token with type: %s, continuing with next token...\n", TokenType_ToString(t->type));
+			fprintf(stderr, "Unexpected token with type: %s\n, continuing with next token...\n", TokenType_ToString(t->type));
 			top_frame->instruction_pointer++;
 			break;
 
diff --git a/src/main.c b/src/main.c
index 3d83bea..4e9bba1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -56,10 +56,10 @@ char* load_file_string(StringView path)
 		return NULL;
 	}
 
-	if (fseek(stream, 0, SEEK_SET)) {
-		perror("fseek");
-		return NULL;
-	}
+    if (fseek(stream, 0, SEEK_SET)) {
+        perror("fseek");
+        return NULL;
+    }
 
 	char* buffer = malloc(length + 1);
 	if (buffer == NULL) {
@@ -68,8 +68,9 @@ char* load_file_string(StringView path)
 	}
 
 	size_t objects_read = fread(buffer, 1, length, stream);
-	if (objects_read != (size_t) length) {
+	if (objects_read != length) {
 		fprintf(stderr, "Fatal Error: Failed read %li bytes from script file, got only %li\n", length, objects_read);
+        ;
 		free(buffer);
 		return NULL;
 	}
diff --git a/test-inputs/factorial.flup b/test-inputs/factorial.flup
deleted file mode 100644
index 1e6e681..0000000
--- a/test-inputs/factorial.flup
+++ /dev/null
@@ -1,6 +0,0 @@
-factorial: int n -> int
-	| n 0 == -> 1
-	| 1      -> n 1 - factorial n * duplicate println
-	;
-
-25 factorial