There are two piles of coal, A and B. If pile A transports 10 tons to pile B, then pile A will be 5 tons less than pile B. Now after both piles have transported the same number of tons, the rest of pile B is the rest of pile A (17/20). At this time, how many tons of coal are left in Pile A?
甲乙两堆煤，如果甲堆运往乙堆10吨，那么甲堆就会比乙堆少5吨．现在两堆都运走相同的若干吨后，乙堆剩下的是甲堆剩下的(17/20)．这时甲堆剩下的煤是多少吨？
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<gadget id="calculator">17 / 20</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">15 / (3/20)</gadget>
<output>100</output>

<result>100</result>