One cup holds 250ml of water, how many cups of this water is 1 liter.
一个杯子装250毫升的水，多少杯这样的水是1升．
<gadget id="calculator">1_000 / 250</gadget>
<output>4</output>

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

<result>4</result>