#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
vector<int> mul(vector<int> &A,vector<int> &B){
	vector<int> C;int t=0;
	for(int i=0;i<A.size()||t;i++){
		for(int j=0;j<B.size();j++){
			if(i<A.size())t+=A[i]*B[j];
		}
		C.push_back(t%10);
		t/=10;
	}return C;
}
int main(){
	string a, b;
	vector<int> A;
	vector<int> B;
	cin>>a>>b;
	for(int i=a.size()-1;i>=0;i--)A.push_back(a[i]-'0');
	for(int i=b.size()-1;i>=0;i--)B.push_back(b[i]-'0');
	vector<int> C;
	C=mul(A,B);
	for(int i=C.size()-1;i>=0;i--)printf("%d",C[i]);
}