A jacket is 120 yuan, and a pair of trousers is 60 yuan. You can get a 10% discount if you buy a pair of clothes. How much does it cost your mother to buy such a set of clothes?
上衣一件120元，裤子一条60元，买一套可以打九折优惠，妈妈买这样一套服装要花多少元．
<gadget id="calculator">120 + 60</gadget>
<output>180</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">180 * (9/10)</gadget>
<output>162</output>

<result>162</result>