A kind of newspaper, if subscribed once a month, there is no discount, it costs 10 yuan. If you book once a year, you can get a 10% discount. QHow much does it cost to subscribe for a year?
一种报纸，如果一个月一订，没有优惠，需10元．如果一年一订，可优惠10%．问订阅一年需要多少钱？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">10 * 12 * (9/10)</gadget>
<output>108</output>

<result>108</result>