for (in cycle)

for
#include <stdio.h>
main()
{
    int j,k;
    float sum,pr;


    for (j=1,pr=1;j<=3;j++)
    {
        for (k=1,sum=0;k<=3;k++)
            sum+=k+j;
        pr*=sum/j*j;
    }
    printf ("PR=%f",pr);
}