Mom bought 20 kilograms of fruit and ate (2/5), how many kilograms are left?
妈妈买来20千克水果，吃了(2/5)，还剩过少千克？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 * (3/5)</gadget>
<output>12</output>

<result>12</result>