/**************************************
* AUTHOR : SHAKIL MOSHARROF 202014048 *
* NICK : xBCC [2013-2019] C/N:1819    *
* INSTITUTION : MIST CSE 20           *
***************************************/
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
#include<float.h>
#define PI 3.14
int main() 
{
	long double a,b;
	scanf("%Ld %Ld",&a,&b);
	int result=100.05*b;
	printf("%Ld",(int)a*c/100 );


return 0;
}
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