The cafeteria used to burn 25 kilograms of coal per day. After improving the stove, it saves 5 kilograms per day. How many days can it burn coal that used to burn for 8 days?
食堂原来每天烧煤25千克，改进炉灶后，每天节约5千克，原来烧8天的煤，现在可以烧多少天？
<gadget id="calculator">25 * 8</gadget>
<output>200</output>

<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<gadget id="calculator">200 / 20</gadget>
<output>10</output>

<result>10</result>