There is a pile of coal in the school cafeteria. It is planned to burn 75 kilograms per day, which can be burned for 40 days. Thanks to the improvement of the stove, the actual saving is 15 kilograms per day. How many days can it actually be burned?
学校食堂有一堆煤，计划每天烧75千克，可以烧40天，由于改进炉灶，实际每天节约15千克，实际可以烧多少天？
<gadget id="calculator">75 * 40</gadget>
<output>3_000</output>

<gadget id="calculator">75 - 15</gadget>
<output>60</output>

<gadget id="calculator">3_000 / 60</gadget>
<output>50</output>

<result>50</result>