long long int arithmetics

Question

I have the following in C:

long long int a;
long long int b;
long long int c;
long long int d=a*b/c;

However, I want 'd' to be double. Is there a way I can multiply, divide long long int and get a double as an answer keeping up to 3 decimals as precision?

Thanks

Answer 1

Cast (at least) one of the long long ints to double

double d = a * (double)b / c;