The price ratio of goods A and B is 5:4. If the price of A is allocated to B by 20 yuan, then the price ratio of goods A and B is 1:8. What is the price of commodity B?
甲、乙两商品的价格比是5：4，如果把甲的价格调配20元给乙，那么甲、乙两商品的价格比是1：8，则乙商品价格是多少元．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) * 20</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">20 + (5/2)</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(1/8) * (4/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(45/2) / (9/10)</gadget>
<output>25</output>

<gadget id="calculator">25 * (4/5)</gadget>
<output>20</output>

<result>20</result>