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 $450,000 house for a downpayment.  How long will it take?
He saves 150,000*.1=$
<gadget id="calculator">150000*.1</gadget>
<output>15_000</output>
15,000 per year.
He needs 450,000*.2=$
<gadget id="calculator">450000*.2</gadget>
<output>90_000</output>
90,000.
So he needs to save for 90,000/15,000=
<gadget id="calculator">90000/15000</gadget>
<output>6</output>
6 years.

<result>6</result>