#include<iostream>
using namespace std;

typedef struct fraction{
   int num;
   int den;
} fraction;

void printF(fraction);
fraction multiplyF(fraction,fraction);

int main(){
  fraction f1, f2, f3; // create 3 fractions
  f1.num = 3;
  f1.den = 5;
  f2.num = 2;
  f2.den = 7;
  f3 = multiplyF(f1,f2);
  printF(f1);
  cout << " * ";
  printF(f2);
  cout << " = ";
  printF(f3);
  cout << endl;
}

fraction multiplyF(fraction x, fraction y){
   fraction answer;
   answer.num = x.num*y.num;
   answer.den = x.den*y.den;
   return answer;
}

void printF(fraction f){
    cout << f.num << "/" << f.den;
}