A pack of tea leaves weighs 1 kg, how many grams of tea leaves are left after pouring out (1/4)?
一包茶叶重l千克，倒出(1/4)后还剩下多少克茶叶？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 * (3/4)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>