class Calculator:
	def add(a,b):
		return a+b
	def sub(a,b):
		if(a>b):
 			return a-b
		else:
			return b-a
	def mul(a,b):
		return a*b
	def div(a,b):
		return a/b
	def mod(a,b):
		return a%b
	x=add(4,5)
	print(x)
	y=sub(6,7)
	print(y)
	z=mul(3,2)
	print(z)
	c=div(4,2)
	print(c)
	d=mod(4,2)
	print(d)


