题解 | #简单计算器#

s = input()

operator = ('+','-','*','/')

for i in s:
    if i in operator:
        a,b = map(float,s.split(i))
        break
        
if i == '+':
    print(f'{a:.4f}+{b:.4f}={a+b:.4f}')
elif i == '-':
    print(f'{a:.4f}-{b:.4f}={a-b:.4f}')
elif i == '*':
    print(f'{a:.4f}*{b:.4f}={a*b:.4f}')
elif i == '/':
    if b == 0:
        print('Wrong!Division by zero!')
    else:
        print(f'{a:.4f}/{b:.4f}={a/b:.4f}')
else:
    print('Invalid operation!')