class BMI:
    def __init__(self, weight, height):
        self.weight = weight
        self.height = height / 100
        self.total = 0

    def calculate(self):
        self.total = self.weight / (self.height ** 2)
        return self.total

    def bmical(self):
        if self.total < 18.5:
            print("저체중")
        elif self.total < 23:
            print("정상")
        elif self.total < 25:
            print("과체중")
        else:
            print("비만")

bmi = BMI(70, 180)
bmi.calculate()
bmi.bmical()