A bag of tea leaves weighs 600 grams, use up (3/5), how many grams are left?
一包茶叶重600克，用去(3/5)，还剩多少克？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">600 * (2/5)</gadget>
<output>240</output>

<result>240</result>