#include <bits/stdc++.h>


int main() {

  long ans;
  std::string tstr;
  char str[128];
  long p = 0;
  long N;
  long temp;
  char ope;

  std::cin >> tstr;
  strcpy( str, tstr.c_str() );
  N = tstr.size();

  p = 0;
  temp = 0;
  for(int i = p; i < N; ++i) {
    if( not ( '0' <= str[i] and str[i] <= '9' ) ) {
      p = i;
      break;
    }
    temp *= 10;
    temp += str[i] - '0';
  }
  ans = temp;

  for(;;) {
    if( p >= N ) { break; }
    ope = str[p];
    p += 1;
    temp = 0;
    for(int i = p; i < N; ++i) {
      if( not ( '0' <= str[i] and str[i] <= '9' ) ) {
	p = i;
	break;
      }
      temp *= 10;
      temp += str[i] - '0';
    }
    switch( ope ) {
    case '+':
      ans *= temp;
      break;
    case '*':
      ans += temp;
      break;
    }
  }

  std::cout << ans << std::endl;
  
  return 0;
}