A cup of milk is 250 ml, how many cups of this milk is 1 liter.
一杯牛奶是250毫升，多少杯这样的牛奶就是1升．
<gadget id="calculator">1_000 / 250</gadget>
<output>4</output>

<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<result>4</result>