The Red Star Canteen used 2.4 tons in the first 8 days of April. According to this calculation, how many tons of coal will be used this month? (Solution by proportional method)
红星食堂四月份前8天用了2.4吨，照这样计算，这个月要用煤多少吨？(用比例方法解)
<gadget id="calculator">2.4 / 8</gadget>
<output>0.3</output>

<gadget id="calculator">0.3 * 30</gadget>
<output>9</output>

<result>9</result>