A water tank can hold 2 liters of water, if 250 ml of water is put in every second, how many seconds will it be full?
一个水缸可盛水2升，如果每秒放250毫升水，多少秒可以放满．
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 / 250</gadget>
<output>8</output>

<result>8</result>