#include<bits/stdc++.h> using namespace std; int a,b,t1,t2,g1,g2; int main() { //freopen("J2.in","r",stdin); //freopen("J2.out","w",stdout); ios::sync_with_stdio(false); cin.tie(0),cout.tie(0); cin>>a>>b; t1=a/10,g1=a%10,t2=b/10,g2=b%10; cout<<t1*t2+t1*g2+t2*g1+g1*g2<<'\n'; return 0; }