#include<stdio.h>
int main()
{
	char str[102];
	scanf("%s", str);
	int i;
	long long int symbol[102], j, value[102], k;
	j = 0;
	k = 0;
	value[0] = 0;
	for (i = 0; str[i] != '\0'; i++){
		if ('0' <= str[i] && str[i] <= '9'){
			value[k] = 10 * value[k] + str[i] - '0';
		}else{
			j++;
			value[j] = 0;
			symbol[k] = str[i];
			k++;
		}
	}
	long long int ans = value[0];
	for (i = 1; i <= j; i++){
		if (symbol[i - 1] = '*'){
			ans += value[i];
		}else{
			ans *= value[i];
		}
	}
	printf("%lld\n", ans);
}