A pack of tea leaves weighs 500 grams, and if (3/5) is used, how many grams are used?
一包茶叶重500克，用去(3/5)，用去多少克？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">500 * (3/5)</gadget>
<output>300</output>

<result>300</result>