package main

import (
	"fmt"
	"strconv"
)

func main() {
	var s, n string
	fmt.Scan(&s)
	sym := make([]int, 0)
	num := make([]int, 0)
	for i := 0; i < len(s); i++ {
		if s[i]=='*' {
			sym = append(sym, 1)
			i, _ := strconv.Atoi(n)
			num = append(num, i)
			n = ""
		}else if s[i]=='+'{
			sym = append(sym, 2)
			i, _ := strconv.Atoi(n)
			num = append(num, i)
			n = ""
		}else{
			n = n + string(s[i])
		}
	}
	i, _ := strconv.Atoi(n)
	num = append(num, i)
	ans := num[0]
	for i := 0; i < len(sym); i++ {
		if (sym[i]==1){
			ans += num[i+1]
		}else{
			ans *= num[i+1]
		}
	}
	fmt.Println(ans)
}