#include <iostream>
#include <math.h>
#include <stdio.h>



using namespace std;



int main()
{
    /* define your variables */
    double ID, velocity, kv, Re;

    cout << "Please define your pipe diameter in feet" << endl;
    cin >> ID;

    cout << "Please define your mean velocity flow in ft/sec^2" << endl;
    cin >> velocity;

    cout << "Please define your mean kinematic viscosity in ft^2/sec" << endl;
    cin >> kv;

    Re = (ID * velocity) / kv;

    cout << "Your Reynolds number is " << Re << endl;


    return 0;
}