def myeval(S):
    op = ""
    num = ""
    res = 0
    for c in S:
        if c != "+" and c != "*":
            num += c
        else:
            if op == "":
                res = int(num)
            else:
                if op == "+":
                    res += int(num)
                else:
                    res *= int(num)
            num = ""
            op = c
    if op == "+":
        res += int(num)
    else:
        res *= int(num)
    return res

S = input().rstrip()
S = S.replace("*", "%")
S = S.replace("+", "*")
S = S.replace("%", "+")
print(myeval(S))