#include <bits/stdc++.h>

using namespace std;

int ans = 0, val = 0;
char op = '*';
bool f = true;

void calc()
{
    if (op == '+') ans *= val;
    if (op == '*') ans += val;
    val = 0;
}

int main()
{
    string e; cin >> e;

    for (int i = 0; i < e.size(); ++i) {
        if (e[i] == '+') {
            calc();
            op = '+';
        } else if (e[i] == '*') {
            calc();
            op = '*';
        } else {
            val *= 10;
            val += e[i] - '0';
        }
    }

    calc();

    cout << ans << endl;
}