#include<cstdio>

int main()
{
	int x,y,lena=0,lenb=0,i,j,ans=0,a[100],b[100];
	scanf("%d%d",&x,&y);
	while(x)
	{
		lena++;
		a[lena]=x%10;
		x=x/10;
	}
	while(y)
	{
		lenb++;
		b[lenb]=y%10;
		y=y/10;
	}
	for(i=1;i<=lena;i++)
	    for(j=1;j<=lenb;j++)
	        ans+=a[i]*b[j];
	printf("%d\n",ans);
}