Xiaojun's family saves 500 kilograms of water in one month, and can save 5 tons of water in a few months.
小军家1个月节约用水500千克，多少个月可节水5吨．
<gadget id="calculator">5 * 1_000</gadget>
<output>5_000</output>

<gadget id="calculator">5_000 / 500</gadget>
<output>10</output>

<result>10</result>