The donkey carries 8 bags of rice, and the mule carries 12 bags of rice. How many bags of rice does the mule give the donkey, and they carry the same amount of rice?
驴子背着8袋米，骡子背着12袋米．骡子给驴子多少袋米，它们就背着同样多的米？
<gadget id="calculator">12 + 8</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<result>2</result>