pile of coal used to burn 5 tons per day, and it can be burned for 54 days. After the stove is improved, 0.5 tons can be saved every day. How many days can this pile of coal be burned now?
一堆煤，原来每天烧5吨，能烧54天，改进炉灶后，每天节约0.5吨，这堆煤现在可以烧多少天？
<gadget id="calculator">5 - 0.5</gadget>
<output>4.5</output>

<gadget id="calculator">54 / 4.5</gadget>
<output>12</output>

<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<result>60</result>