There are two boxes of pears, the first box weighs 20 kilograms, if you take out (3/10) from the first box and put it into the second box, then the weight of the two boxes of pears is equal, how much more is the first box than the second box?
有两箱梨，第一箱重20千克，如果从第一箱中取出(3/10)放入第二箱，则两箱梨的质量相等，原来第一箱比第二箱多多少千克？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">20 * (3/10) * 2</gadget>
<output>12</output>

<result>12</result>