A small theater company sells tickets to a show.  They have a 400 seat theater and fill to 80% capacity.  Each ticket cost $30.  They repeated the same performance 2 other days.  How much did they make?
They sold 400*.8=<T>multiply(400, 0.8)=320.0 tickets each day
So each day they made 320*30=$<T>multiply(320, 30)=9600
They did 2+1=<T>add(2, 1)=3 days
So they made 9600*3=$<T>multiply(9600, 3)=28800
,800