#include <stdio.h>

double compute(double, double);

void main()
{
    double v1, v2, v3;
    v1 = 36.8;
    v2 = 4.6;

    v3 = compute(v2, v1);
    printf("For v1 = %f and v2 = %f\n", v1, v2);
    printf("v3 = %f\n", v3);

}

double compute(double x, double y)
{
    double z;
    z = (3.6/(4.3 + 0.4*x))*y;
    return(z);
}