#include <stdio.h>

int main(void)
{
    int p, s;
    float n, d, v;

    printf("Enter p, n, and d: ");
    scanf("%d%f%f", &p, &n, &d);
    printf("Enter s: ");
    scanf("%d", &s);

    v = (p + n / d) * s;

    printf("Value: %.2f\n", v);
    return 0;
}