#include <stdio.h>
#include <math.h>
int main()
{
const int mult = 1000;
for (int denom = 10; denom <= mult * 10; denom *= 10) {
for (int numer = 1; numer < denom; numer++) {
double frac = ((double) numer) / denom;
int f = (int) (frac * mult);
int r = (int) round(frac * mult);
if (frac * mult != (double) (numer * mult / denom)) {
printf("%d/%d * mult = %d or %d\n", numer, denom, f, r);
}
}
}
}