class FourCal:
def __init__(self, first, second):
self.first = first
self.second = second
def setdata(self, first, second):
self.first = first
self.second = second
def add(self):
result = self.first + self.second
def sub(self):
result = self.first - self.second
return result
def mul(self):
result = self.first * self.second
return result
def div(self):
result = self.first / self.second
return result
a = FourCal()
시발년아