A and B are traveling towards each other from AB, the speed ratio is 5:3, the distance between the second meeting place and the third meeting place is 20 kilometers, how many kilometers are the distances between AB and AB?
甲乙两人分别从AB两地相向而行，速度比是5：3，第二次相遇地点与第三次相遇地点相距20千米，AB两地相距多少千米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) / (1/4)</gadget>
<output>1</output>

<gadget id="calculator">1 * (5/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">10 / 8</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/8) + (5/4)</gadget>
<output>15/8 = around 1.875</output>

<gadget id="calculator">2 - (15/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(5/8) - (1/8) - (1/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">20 / (3/8)</gadget>
<output>160/3 = around 53.333333</output>

<result>160/3 = around 53.333333</result>