Uncle Li’s house has a barrel of honey, which weighs 42 kilograms. After half of the honey is poured out, there are 22 kilograms left in the barrel and honey. How many kilograms is this bucket of honey?
李叔叔家有一桶蜂蜜，桶和蜜共重42千克，倒出一半蜜后，桶和蜜还剩22千克．这桶蜜原有多少千克？
<gadget id="calculator">42 - 22</gadget>
<output>20</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<result>40</result>