There are two piles of coal, the first pile is (1/2) times the second pile, the first pile uses 8 tons, the second pile uses 11 tons, the weight of the rest of the first pile and the rest of the second pile The ratio is 4:10, find the original weight of the second pile.
有两堆煤，第一堆是第二堆的(1/2)倍，第一堆用去8吨，第二堆用去11吨，第一堆剩下的与第二堆剩下的重量之比是4：10，求第二堆原来的重量．
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 11</gadget>
<output>22/5 = around 4.4</output>

<gadget id="calculator">8 - (22/5)</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(18/5) / (1/10)</gadget>
<output>36</output>

<result>36</result>