#include    <stdio.h>

int main(){
    double v, t;
    char buf[128];
    
    scanf("%lf%lf", &v, &t);
    sprintf(buf,"%f", (v*t));
    for (int i = 0; buf[i] != 0; i++) {
    	if (buf[i] == '.') {
    		buf[i] = 0;
    		break;
    	}
    }
    printf(buf);
}