A cow weighs 500 kg, and an elephant weighs three times that of a cow. What is the total weight of a cow and an elephant?
一头牛重500千克，一头大象的体重是牛的3倍，一头牛和一头大象一共重多少千克．
<gadget id="calculator">500 * 3</gadget>
<output>1_500</output>

<gadget id="calculator">500 + 1_500</gadget>
<output>2_000</output>

<result>2_000</result>