The factory has 89.04 tons of coal, and 25.44 tons were burned in the first 6 days. According to this calculation, how many days can the remaining coal be burned?
工厂有89.04吨煤，前6天烧了25.44吨，照这样计算，剩下的煤还可以烧多少天？
<gadget id="calculator">89.04 - 25.44</gadget>
<output>63.6</output>

<gadget id="calculator">25.44 / 6</gadget>
<output>4.24</output>

<gadget id="calculator">63.6 / 4.24</gadget>
<output>15</output>

<result>15</result>