If you buy a house, the price is 280,000 yuan, and you pay 20,000 yuan a year, how many years will it take to pay off?
买一套住房，售价28万元，每年付2万元，多少年后才能付清？
<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<result>14</result>