multiplication pointers in variables

#include <iostream>
#include <Windows.h>



uint64_t* _mul (uint64_t *a, uint64_t *b)
{
    return (uint64_t*)((uint64_t)a * (uint64_t)b);
}


int main()
{
    uint64_t* a = (uint64_t*)5;
    uint64_t* b = (uint64_t*)5;
    printf("%d\n", (uint64_t)_mul(a, b));

    return 0;
}//Credits Denis Yurichev