#include <cstdio>
#include <cstring>

class range {private: struct I{int x;int operator*(){return x;}bool operator!=(I& lhs){return x<lhs.x;}void operator++(){++x;}};I i,n;
public:range(int n):i({0}),n({n}){}range(int i,int n):i({i}),n({n}){}I& begin(){return i;}I& end(){return n;}};

int main(void) {
  char s[1024]; scanf("%s", s);
  int res = 0;
  int tmp = 0;
  char ope = '?';
  for(int i : range(strlen(s))) {
    if(s[i] == '+' || s[i] == '*') {
      if(ope == '?') { res = tmp; }
      else if(ope == '+') { res *= tmp; }
      else { res += tmp; }
      ope = s[i];
      tmp = 0;
    } else {
      tmp = tmp * 10 + (s[i] - '0');
    }
  }
  if(ope == '+') { res *= tmp; }
  else { res += tmp; }
  printf("%d\n", res);
  return 0;
}