#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES

#ifdef __unix__
#include <bits/stdc++.h>
#else
#include "bits\stdc++.h"
#endif
#include <vector>
#include <set>
#include <string>
#include <queue>
#include <list>
#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)
using namespace std;
#define VI vector<int>
#define ll long long
#define ull unsigned ll
typedef long double ld;
#define SQR(X) ((X)*(X))

int main() {
  char s[105];
  cin >> s;
  char *i;
  int val = strtol(s,&i,10);
  while(*i) {
    if(*i == '+') val *= strtol(i+1,&i,10);
    else  val += strtol(i+1,&i,10);
  }
  cout << val << endl;
  return 0;
}