#!/usr/bin/env python3 s = list(input()) p = 0 def term(): global p n = 0 while p < len(s) and s[p] != '*' and s[p] != '+': n = n * 10 + int(s[p]) p += 1 return n def expr(): global ans, p q = p p += 1 t = term() if s[q] == '*': ans += t else: ans *= t ans = term() while p < len(s): expr() print(ans)