def main():
    s = input()

    idx = 0
    while idx < len(s) and s[idx].isdigit():
        idx += 1

    res = int(s[:idx])
    for i in range(len(s)):
        if not s[i].isdigit():
            idx = i+1
            while idx < len(s) and s[idx].isdigit():
                idx += 1

            if s[i] == "+":
                res *= int(s[i+1:idx])
            elif s[i] == "*":
                res += int(s[i+1:idx])

    print(res)


if __name__ == '__main__':
    main()