There are two piles of coal, A and B, and the weight of A pile is 24 tons less than that of B pile (3/4). If 48 tons are transferred from pile B to pile A, the weight of pile A is exactly (9/10) of pile B. How many tons is the difference between A and B piles of coal?
有甲、乙两堆煤，甲堆重量比乙堆的(3/4)少24吨．若从乙堆调运48吨到甲堆，则甲堆的重量正好是乙堆的(9/10)．甲、乙两堆煤相差多少吨？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 448</gadget>
<output>336</output>

<gadget id="calculator">336 - 24</gadget>
<output>312</output>

<result>312</result>