After the elder brother gave the younger brother 4 pencils, the elder brother and the younger brother have the same number of pencils. It turns out that the older brother has more pencils than the younger brother.
哥哥给弟弟4支铅笔后，哥哥与弟弟的铅笔就一样多了，原来哥哥比弟弟多多少支铅笔．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>