Long-distance running exercise, Xiaoxiong ran 3 kilometers, and Xiaoxiong's (5/6) was equal to Xiaogang's. Xiaogang ran Xiaoyong's (4/5). How many kilometers did Xiaoyong run?
长跑锻炼，小雄跑了3千米，小雄跑的(5/6)等于小刚跑的．小刚跑的是小勇的(4/5)．小勇跑多少千米？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

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

<gadget id="calculator">(5/6) / (4/5)</gadget>
<output>25/24 = around 1.041667</output>

<gadget id="calculator">3 * (25/24)</gadget>
<output>25/8 = around 3.125</output>

<result>25/8 = around 3.125</result>