There are 250 kilograms of rice in the school cafeteria. After eating 40%, how many kilograms are left?
学校食堂有大米250千克，吃了40%后，还剩多少千克？
<gadget id="calculator">40 / 100</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">250 * (3/5)</gadget>
<output>150</output>

<result>150</result>