A pile of coal is removed for the first time (1/4), and there are 60 tons left, and 20% is removed for the second time, how many tons are removed for the second time?
一堆煤，第一次运走(1/4)，还剩下60吨，第二次又运走20%，第二次运走多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">60 / (3/4)</gadget>
<output>80</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">80 * (1/5)</gadget>
<output>16</output>

<result>16</result>