A pile of coal weighs 40 kilograms. Five-eighths of it is transported on the first day, and three-eighths of it is transported on the second day. How much less is transported on the second day than on the first day?
一堆煤有40千克，第一天运走它的八分之五，第二天运走它的八分之三，第二天比第一天少运多少？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 * (1/4)</gadget>
<output>10</output>

<result>10</result>