#include "bits/stdc++.h" using namespace std; string a,b,qq=""; int c[5005]; signed main(){ cin >> a >> b; for(int i=0;i<abs(a.size()-b.size());i++) qq+="1"; if(a<b)a=qq+a; else b=qq+b; for(int i=0;i<a.size();i++){ c[i]+=a[i]*b[i]; c[i]%=10; c[i+1]+=(a[i]*b[i])/10; } for(int i=0;i<a.size();i++)cout << c[i]; return 0; }