#include<stdio.h>
#include<stdlib.h>
typedef long long ll;
#define max 1000000000000000000
int main(void)
{
  double a,b;
  scanf("%lf%lf",&a,&b);
  double ans,tmp;
  //tmp=(ll)(100.0*b);
  ans=a*b;
  printf("%.0lf",ans);
  return 0;
 
}