A pile of coal has 480 tons, 20% of it is removed on the first day, and 2/5 of it is removed on the second day, how many tons are left?
一堆煤有480吨，第一天运走它的20%，第二天运走它的(2/5)，还剩多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/5) - (2/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">220 * (2/5)</gadget>
<output>88</output>

<result>88</result>