Python Inheritance

create program to calculate volume of small box and big box  and find the capacity =big box/ small box

program

class Box:
    def __init__(self,length,width,height):
        self.length=length
        self.width=width
        self.height=height
    def getvolume(self):
        vol=self.length*self.width*self.height
        return vol
class BigBox(Box):
    def __init__(self,length,width,height):
        Box.__init__(self,length,width,height)
    def getcapicity(self,sbox):
        self.sbox=sbox
        capacity=Box.getvolume(self)/sbox.getvolume()
        return capicity
s=Box(2,1,1)
b=BigBox(4,4,4)
s1=b.getcapacity(s)
print(s1)