numberinput = input() a = [] b = ['+','-','*','/'] count = 0 num1 = '' num2 = '' for i in range(len(numberinput)): a.append(numberinput[i]) for i in range(len(a)): if a[i] in b: count = i break else: num1 = num1+a[i] for j in range(count+1,len(a)): num2 = num2+a[j] num1 = int(num1) num2 = int(num2) if a[count] == '+': print(num1+num2) elif a[count] == '-': print(num1-num2) elif a[count] == '*': print(num1*num2) else: print(int(num1/num2)) 可以請大家幫我一下嗎