The weight of a panda is 80 kg, and the weight of an elephant is 4 tons. How much heavier is an elephant than a panda?
熊猫的体重是80千克，大象的体重是4吨，大象的体重比熊猫重多少千克？
<gadget id="calculator">4 * 1_000</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 - 80</gadget>
<output>3_920</output>

<result>3_920</result>