#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
	string s1,s2,s3;
	cin>>s1>>s2;
	if(s1.size()<s2.size()){
		while(s1.size()<s2.size()) s1='0'+s1;
	}else if(s2.size()<s1.size()){
		while(s2.size()<s1.size()) s2='0'+s2;
	}
	int shengyu=0,jingwei=0;
	for(int i=s1.size()-1;i>=0;i--){
		int num=s1[i]-'0',num2=s2[i]-'0';
		int c=num*num2;
		int shengyu=c%10,jingwei=c/10;
		s3[i]=char(shengyu+'0');
		if(jingwei!=0){
			if(i-1>-1) s3[i-1]=char((int)(s3[i-1])*jingwei);
			else cout<<jingwei;
		}
	}
	for(int i=s3.size()-1;i>=0;i--) cout<<s3[i];
	return 0;
}