pile of coal has 220 tons. One fifth of the total is removed on the first day, and 25% of the total is removed on the second day. How many tons more are removed on the second day than on the first day?
一堆煤有220吨，第一天运走总数的(1/5)，第二天运走总数的25%，第二天比第一天多运走多少吨？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">220 * (1/20)</gadget>
<output>11</output>

<result>11</result>