A piece of clothing is priced at 120 yuan. If you sell it according to the price, you can earn 20%; if you sell it at 10% off the price, how much money can you earn?
一件衣服标价120元，如果按照标价卖，可赚20%；如果按照标价的9折卖，可以赚几元钱？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">120 * (9/10)</gadget>
<output>108</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">120 / (6/5)</gadget>
<output>100</output>

<gadget id="calculator">108 - 100</gadget>
<output>8</output>

<result>8</result>