A box of oranges weighs 21.5 kilograms. After pouring out half of the oranges, the remaining oranges weigh 11.5 kilograms. How many kilograms did the oranges in the original box weigh?
一箱桔子连箱重21.5千克，倒出一半桔子后，剩下的桔子连箱重11.5千克，原来箱里的桔子重多少千克？
<gadget id="calculator">21.5 - 11.5</gadget>
<output>10</output>

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

<result>20</result>