The original price of a coat is 120 yuan, what is the price after the 10% discount?
一件上衣原价120元，九折后的价格是多少．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

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

<result>108</result>