Two snails, A and B, crawl towards each other from ends A and B of a bamboo pole. A climbs (2/5) m first and then B crawls from the other end. When they meet, A travels longer (2/5) than B. If the speed ratio of A and B is 5:4, how many meters is this bamboo pole?
有甲、乙两只蜗牛从一根竹竿的A、B两端相向爬行，甲先爬(2/5)m后，乙从另一端爬行．当它们相遇时，甲比乙多行(2/5)的路程，如果甲、乙的速度比是5：4，这根竹竿长多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(2/5) - (5/4)</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">(2/5) / (3/20)</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">(8/3) * (7/5)</gadget>
<output>56/15 = around 3.733333</output>

<gadget id="calculator">(8/3) + (56/15)</gadget>
<output>32/5 = around 6.4</output>

<result>32/5 = around 6.4</result>