The mass ratio between A and B piles is 8:5. When pile A is transported away (1/4), pile B is 20 tons less than pile A. How many tons does pile A have?
甲、乙两堆货物质量的比是8：5，当甲堆运走(1/4)后，乙堆比甲堆少20吨，原来甲堆有多少吨？
<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">20 * 8</gadget>
<output>160</output>

<result>160</result>