A jacket is 145 yuan, the price of a pair of trousers is the price of the jacket (2/5), how much is a pair of trousers.
一件上衣145元，一条裤子的价格是上衣的(2/5)，一条裤子多少元．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">145 * (2/5)</gadget>
<output>58</output>

<result>58</result>