To subscribe to a newspaper, if you subscribe once a month, you need 15 yuan per month. If you subscribe once a year (pay for one year), you can get a 20% discount. How much does it cost to subscribe to this newspaper for a year?
订阅一种报纸，如果一个月一订，每月需要15元，如果一年一订(一次交一年的钱)，可八折优惠，订阅这种报纸一年一订要交多少钱？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">15 * 12 * (4/5)</gadget>
<output>144</output>

<result>144</result>