A faucet that is not tightened tightly will drain 12.5 kilograms of water a day. According to this calculation, how many kilograms of water will be wasted in May?
一个拧不紧的水龙头一天就白白流掉12.5千克水，照这样计算，五月份一个月大约浪费多少千克水？
<gadget id="calculator">12.5 * 31</gadget>
<output>387.5</output>

<result>387.5</result>