How many cups can be poured by pouring 4 liters of water into a 50 ml measuring cup?
把4升水倒入50毫升的量杯，可以倒多少杯．
<gadget id="calculator">4 * 1_000</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 / 50</gadget>
<output>80</output>

<result>80</result>