A pile of coal, originally planned to burn 3 tons per day, can be burned for 72 days. After improving the technology, only 2.4 tons are burned per day. Can this pile of coal be burned for a few days longer than the original?
一堆煤，原计划每天烧3吨，可以烧72天．改进技术后，每天只烧2.4吨．这堆煤可以比原来多烧几天？
<gadget id="calculator">3 * 72</gadget>
<output>216</output>

<gadget id="calculator">216 / 2.4</gadget>
<output>90</output>

<gadget id="calculator">90 - 72</gadget>
<output>18</output>

<result>18</result>