#include<stdio.h>

int main(void){

	int d;
	scanf("%d",&d);
	char c;
	scanf("%c",&c);
	while(c=='*' || c=='+'){
		int t;
		scanf("%d",&t);
		if('*'==c){
			d=d+t;
		} else {
			d=d*t;
		}
		scanf("%c",&c);
	}
	printf("%d\n",d);
	return 0;
}