The weight of Xiaohua and Xiaoqiang is 84 kg, the weight of Xiaohua and Xiaoling is 80 kg, the weight of Xiaoqiang and Xiaoling is 82 kg, how much is Xiaohua heavier than Xiaoling?
小华和小强的体重是84千克，小华和小玲的体重是80千克，小强和小玲的体重是82千克，小华比小玲重多少千克．
<gadget id="calculator">84 - 82</gadget>
<output>2</output>

<result>2</result>