The weight of the lamb is 30 kg. The weight of the calf is 3 times that of the lamb and 10 kg more than twice the weight of the pig. What is the weight of the pig?
小羊的体重是30千克，小牛的体重是小羊的3倍，比小猪体重的2倍还重10千克，小猪的体重是多少千克．
<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">90 - 10</gadget>
<output>80</output>

<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<result>40</result>