In order to maintain life, each person needs about 2.5 liters of water per day, which is about how many liters of water are needed by 100,000 people per day.
为了维持生命，每人每天需要约2.5升水，10万人每天大约需要多少升水．
<gadget id="calculator">10 * 10_000</gadget>
<output>100_000</output>

<gadget id="calculator">2.5 * 100_000</gadget>
<output>250_000</output>

<result>250_000</result>