#include
int main(void)
{
int a,b;
double S;
printf("Input a and b:");
scanf("%d%d",&a,&b);
S = (double)(2 * a * b) / ((a b) *
(a b));
printf("S=%lf",S);
return 0;
}
#include
int main(void)
{
int a,b;
double S;
printf("Input a and b:");
scanf("%d%d",&a,&b);
S = (double)(2 * a * b) / ((a b) *
(a b));
printf("S=%lf",S);
return 0;
}