For a pile of coal, (1/4) of it is transported away for the first time, and the remaining 50% is transported away for the second time, and the second time transports 5 tons more than the first time. How many tons is this pile of coal?
一堆煤，第一次运走它的(1/4)，第二次运走余下的50%，第二次比第一次多运5吨．这堆煤有多少吨？
<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">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/4) * (1/2)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) - (1/4)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">5 / (1/8)</gadget>
<output>40</output>

<result>40</result>