The price of a set of sportswear is 144 yuan, and the price of the trousers is that of the top (7/9). What is the price of the trousers?
一套运动服的价格是144元，其中裤子的价格是上衣的(7/9)，裤子的价格是多少元．
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">1 + (7/9)</gadget>
<output>16/9 = around 1.777778</output>

<gadget id="calculator">144 / (16/9)</gadget>
<output>81</output>

<gadget id="calculator">81 * (7/9)</gadget>
<output>63</output>

<result>63</result>