import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def MI(): return map(int, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

def main():
    s = input()
    for i in range(100):
        if not s[i].isdigit(): break
    ei = i
    pre = int(s[:ei])
    while ei < len(s) - 1:
        op = s[ei] == "+"
        si = ei + 1
        for ei in range(si, len(s)):
            if not s[ei].isdigit(): break
        if ei==len(s)-1:ei+=1
        if op:
            pre *= int(s[si:ei])
        else:
            pre += int(s[si:ei])
    print(pre)

main()