Jingang Primary School uses an average of 16 tons of water per day, calculated on 31 days in a month, how much water is used in a month.
金岗小学平均每天用水16吨，一个月31天计算，一个月用水多少．
<gadget id="calculator">16 * 31</gadget>
<output>496</output>

<result>496</result>