#include <stdio.h>
#include <malloc.h>
#include <stdint.h>

char str[60000];
int str_len = 0;
/// <summary>
/// グローバル変数strの中身を入力された文字列で上書きする
/// </summary>
void ReadString() {
	char c = getchar();
	str_len = 0;

	while (c != '\n') {
		str[str_len] = c;
		c = getchar();
		str_len++;
	}
}

int main()
{
	ReadString();
	int nowSym = -1;
	int ans = 0;
	int nowNum = 0;
	for (int i = 0;i < str_len;i++) {
		if (str[i] == '*') {
			if (nowSym == -1) {
				ans = nowNum;
			}
			else {
				if (nowSym == 0) ans += nowNum;
				if (nowSym == 1) ans *= nowNum;
				
			}
			nowSym = 0;
			nowNum = 0;
			continue;
		}
		if (str[i] == '+') {
			if (nowSym == -1) {
				ans = nowNum;
			}
			else {
				if (nowSym == 0) ans += nowNum;
				if (nowSym == 1) ans *= nowNum;
			}
			nowSym = 1;
			nowNum = 0;
			continue;
		}
		nowNum = nowNum * 10 + (str[i] - '0');
		
	}
	if (nowSym == 0) {
		ans += nowNum;
	}
	else {
		ans *= nowNum;
	}
	printf("%d\n",ans);
}