#include <stdio.h>
int main(){
    float length, width area;
    scanf("%f", &length);
    scanf("%f", &width);
    if(length<0 || length > 100 || width<0 || width > 100){
        printf("Invalild input\n");
        return 0;
    }
    area=length * width;
    printf("%.2f\n",area);
    return 0;
}