A power plant has 10,200 tons of coal, and it burns 300 tons of coal every day for the first ten days. Later, the stove is improved, and it burns 240 tons of coal every day. How many days can this pile of coal continue to burn?
某发电厂有10200吨煤，前十天每天烧煤300吨，后来改进炉灶，每天烧煤240吨，这堆煤还能烧多少天．
<gadget id="calculator">300 * 10</gadget>
<output>3_000</output>

<gadget id="calculator">10_200 - 3_000</gadget>
<output>7_200</output>

<gadget id="calculator">7_200 / 240</gadget>
<output>30</output>

<result>30</result>