#include <stdio.h>

int main(void) {
	char s[101];
	int i;
	int ans = 0;
	int num;
	int flag;
	
	scanf("%s", s);
	i = 0;
	num = 0;
	while('0' <= s[i] && s[i] <= '9'){
		num = num * 10 + (s[i] - '0');
		i++;
	}
	if(s[i] == '*')flag = 1; 
	if(s[i] == '+')flag = -1;
	i++;
	
	ans = num;
	num = 0;
	while(s[i] != '\0'){
		switch(s[i]){
			case '*':
				if(flag == 1){
					ans += num;
				}
				else{
					ans *= num;
				}
				flag = 1;
				num = 0;
				break;
			case '+':
				if(flag == 1){
					ans += num;
				}
				else{
					ans *= num;
				}
				flag = -1;
				num = 0;
				break;
			
			default:
				num = num * 10 + (s[i] - '0');
				break;
		}
		i++;
	}
	if(flag == 1){
		ans += num;
	}
	else{
		ans *= num;
	}
	printf("%d\n", ans);

	return 0;
}