S = input().strip()

tokens = []
temp_num = ''

# Tokenize the input string
for c in S:
    if c.isdigit():
        temp_num += c
    else:
        tokens.append(int(temp_num))
        temp_num = ''
        tokens.append(c)
tokens.append(int(temp_num))  # Add the last number

current = tokens[0]

# Process each operator and number pair
for i in range(1, len(tokens), 2):
    operator = tokens[i]
    num = tokens[i + 1]
    if operator == '*':
        current += num
    else:  # operator is '+', which means multiplication
        current *= num

print(current)