Both boxes of apples weigh 40 kg. After taking out 8 kg from the first box to the second box, how much more kilograms are there in the second box than the first box?
两箱苹果都重40千克，从第一箱中拿出8千克到第二箱后，第二箱比第一箱多多少千克．
<gadget id="calculator">40 + 8</gadget>
<output>48</output>

<gadget id="calculator">40 - 8</gadget>
<output>32</output>

<gadget id="calculator">48 - 32</gadget>
<output>16</output>

<result>16</result>