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