Mike is saving up to buy a house.  He puts away 10% of his $150,000 a year salary.  He needs to save up 20% of the cost of a $450,000 house for a downpayment.  How long will it take?
He saves 150,000*.1=$<T>multiply(150000, 0.1)=15000.0 per year
He needs 450,000*.2=$<T>multiply(450000, 0.2)=90000.0
So he needs to save for 90,000/15,000=<T>divide(90000, 15000)=6.0 years
