A batch of coal is shipped from the power plant, and it is planned to burn 1 (1/2) ton per day, which can be burned for 35 days. The actual saving of coal burning is 0.25 tons per day compared with the plan. How many days did this batch of coal actually burn? (Solve with ratio)
发电厂运来一批煤，计划每天烧1(1/2)吨，可以烧35天，实际每天比计划节约烧煤0.25吨，这批煤实际烧了多少天？(用比例解)
<gadget id="calculator">52.5 / 1.25</gadget>
<output>42</output>

<result>42</result>