A broken faucet will drain 70 grams of water per minute, how many grams of water will be wasted in half an hour.
一个坏了的水龙头每分钟要白白流掉70克水，半小时要浪费掉多少克水．
<gadget id="calculator">70 * 30</gadget>
<output>2_100</output>

<result>2_100</result>