#include <stdio.h>

double pyVolCalculator(double i, double j); //prototype

int main(int argc, char const *argv[]) {

  printf("%g\n", pyVolCalculator(2.0, 5.0));

  return 0;
}

double pyVolCalculator(double i, double j){ //
  double answer = ( (i * i) * (j / 3) ); //formula
  return answer; //return the answer
}