import std.algorithm, std.array, std.container, std.range;
import std.string, std.conv, std.math;
import std.stdio, std.typecons;

void main()
{
  auto s = readln.chomp;

  auto a = 0;
  auto acc = 0;
  char op;
  foreach (c; s) {
    if (c >= '0' && c <= '9') {
      acc = acc * 10 + c - '0';
    } else {
      a = calc(a, acc, op);
      op = c;
      acc = 0;
    }
  }
  a = calc(a, acc, op);
  writeln(a);
}

int calc(int a, int acc, char op) {
  if (op == '+') {
    a *= acc;
  } else if (op == '*') {
    a += acc;
  } else {
    a = acc;
  }
  return a;
}