#include <stdio.h>
#include <math.h>
int gn(int a,int n){
int sum=1;
for (int i=0;i<n;i++){
sum*=a;
}
return sum;
}
int main(){
long a,n;
if (scanf("%ld %ld",&a,&n)!=EOF){
long s = a;
long inter = a;
for (int i=1;i<n;i++){
inter = inter+gn(10,i)*a;
//printf("%d %d\n",i,inter);
s+=inter;
}
printf("s = %ld",s);
}else{
printf("input wrong");
}
return 0;
}
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