There are 810 tons of coal in the factory, and 187.5 tons have been burned in the past 25 days. According to this calculation, how many days can the remaining coal be burned?
工厂里有810吨煤，在过去的25天里已经烧了187.5吨．照这样计算，剩下的煤还可以烧多少天？
<gadget id="calculator">810 - 187.5</gadget>
<output>622.5</output>

<gadget id="calculator">187.5 / 25</gadget>
<output>7.5</output>

<gadget id="calculator">622.5 / 7.5</gadget>
<output>83</output>

<result>83</result>