1 liter of water is filled in a paper cup with a capacity of 250mL, how many cups can it hold?
1升水用容量是250mL的纸杯来装，可以装多少杯．
<gadget id="calculator">1_000 / 250</gadget>
<output>4</output>

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

<result>4</result>