#include<algorithm>
using namespace std;
int a, b, c,r,mi,ma;
int main() {
	cin >> a >> b >> c;
	 a= min(min(a, b), c);
	 c= max(max(a, b), c);
	 mi = a;
	 ma = c;
	 r = c % a;
		 while (r != 0) {
			 c = a;
			 a = r;
			 r = c % a;
		 }
		 mi /= a;
		 ma /= a;
	cout << mi<<'/'<<ma<<endl;
	return 0;
}