The cafeteria has 460 kg of coal, which has been burned for 12 days, averaging 30 kg per day. How many days can the remaining coal be burned if it burns 25 kilograms a day? (solution with equation)
食堂有460千克煤，已经烧了12天，平均每天烧30千克．剩下的煤如果每天烧25千克，还可以烧多少天？(用方程解答)
<gadget id="calculator">30 * 12</gadget>
<output>360</output>

<gadget id="calculator">460 - 360</gadget>
<output>100</output>

<gadget id="calculator">100 / 25</gadget>
<output>4</output>

<result>4</result>