John decides to buy some birds.  He got 50 dollars from each of his 4 grandparents.  If each bird costs $20, how many wings did all the birds have?
He got 4*50=$<T>multiply(4, 50)=200
That means he was able to buy 200/20=<T>divide(200, 20)=10.0 birds
Since each bird has 2 wings he got 10*2=<T>multiply(10, 2)=20 wings
