# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	val1 = ""
	val2 = None
	calc = None
	S = input()
	N = len(S)
	for i in range(N):
		if S[i] == "+":
			if calc == None:
				calc = "+"
				val1 = int(val1)
				val2 = ""
			else:
				if calc == "+":
					val1 = val1 * int(val2)
					val2 = ""
				else:
					val1 = val1 + int(val2)
					val2 = ""
				calc = "+"
		elif S[i] == "*":
			if calc == None:
				calc = "*"
				val1 = int(val1)
				val2 = ""
			else:
				if calc == "+":
					val1 = val1 * int(val2)
					val2 = ""
				else:
					val1 = val1 + int(val2)
					val2 = ""
				calc = "*"
		else:
			if val2 == None:
				val1 += S[i]
			else:
				val2 += S[i]

	if val2 == None:
		print(val1)
		return

	if calc == "+":
		val1 = val1 * int(val2)
	else:
		val1 = val1 + int(val2)

	print(val1)



if __name__ == '__main__':
	main()