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How many rolls of wallpaper are required for a room with double type variables

#include <iostream> using namespace std; int main() {   double height = 2.2, width = 3.3, length = 4.4;   double perimeter = 0.0;                           double rollwidth = 21.0;                    double rolllength = 12.0*33.0;              int strips_per_roll = 0;                          int strips_reqd = 0;                              int nrolls = 0;                                   strips_per_roll = rolllength / height;         perimeter = 2.0*(length + width);              strips_reqd = perimeter / rollwidth;           nrolls = strips_reqd / strips_per_roll;        cout << nrolls;   return 0; }