A dog weighs 50 kg, and a pig weighs 4 times that of a dog. How many kilograms does a pig weigh more than a dog?
一只狗重50千克，一头猪的体重是狗的4倍，一头猪比一只狗多重了多少千克？
<gadget id="calculator">50 * 4</gadget>
<output>200</output>

<gadget id="calculator">200 - 50</gadget>
<output>150</output>

<result>150</result>