#include<iostream>
#include<iomanip>
#include<string>
using namespace std;
class QuantityCalculation{
    private:
    string name;
    float quan ,price;float res=0;
    public:
    void quantity(string name,float quan,float price){
        res=quan*price;}
    void quantity(){
        cout<<res<<setpercision(2);}};
int main(){
    string name;
    float quan ,price;
    cin>>name>>quan>>price;
    QuantityCalculation q;
    q.quantity(name,quan,price);
    q.quantity();
    return 0;}