n = 0
s = '+'

m = 0

for x in input().split():
    if x in ('+', '-', '/', '*'):
        s = x
    else:
        m = int(x)
    if s == '+':
        n = n + m
    if s == '-':
        n = n - m
    if s == '*':
        n = n * m
    if s == '/':
        if m != 0:
            n = n / m
    if s == '=':
        print(n)