#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(void)
{
    char S[101];
    int sym[49], ans = 0, length, i, j = 0, k;
    scanf("%s", S);
    length = strlen(S);
    for (i = 0; i < length; ++i) {
        if (S[i] == '*' || S[i] == '+') {
            if (S[i] == '*') sym[j] = 0;
            else sym[j] = 1;
            ++j;
        }
    }
    for (i = 0; i <= j; ++i) {
        if (i == 0) ans = atoi(S);
        else if (sym[i - 1] == 0) ans += atoi(S);
        else ans *= atoi(S);
        if (i != j) {
            for (k = 0; S[k] != '*' && S[k] != '+'; ++k) S[k] = '0';
        }
        S[k] = '0';
    }
    printf("%d", ans);
    return 0;
}