#include<bits/stdc++.h>
using namespace std;
int main(){
	double a,b;
	cin>>a>>b;
	double h=0;
	if(a==b){
		cout<<fixed<<setprecision(7)<<1/a;
		return 0;
	}
	for(int i=1;i<=10000000;i++){
		h+=0.0000001;
		double gfd=ceil(h*b);
		if(gfd*a>b){
			cout<<fixed<<setprecision(7)<<h-0.0000001;
			return 0;
		}
	}
    return 0;
}