The cafeteria bought 5 tons of coal and burned 1.5 tons in 6 days. According to this calculation, how many days can this batch of coal be carried? (Solve with ratio)
食堂买来5吨煤，6天烧了1.5吨，照这样计算，这批煤可以捎多少天？(用比例解)
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">30 / 1.5</gadget>
<output>20</output>

<result>20</result>