public static int restaurant(int l, int b) {
    // Write your code here
        int oriSize = l * b;
        int pS = gcd(l, b); // possibleBiggestSide
        
        return (l / pS) * (b / pS);

    }
    
    private static int gcd(int a, int b){
        
        if(a < b){
            int temp = a;
            a = b;
            b = temp;
        }
        if(b == 0) return a;
        return gcd(b, a % b);
        
    }