The weight of a cow is 400 kg, how many such cows weigh 2 tons.
一头牛的体重是400千克，多少头这样的牛重2吨．
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 / 400</gadget>
<output>5</output>

<result>5</result>