Wang Hua and Zhang Qiang set off opposite each other on bicycles at the same time. Wang Hua met Zhang Qiang at the end of the journey (5/8). Zhang Qiang continued to ride forward at a speed of 12 kilometers per hour and finished the rest of the ride in 2.5 hours. For the distance, ask for Wang Hua's speed.
王华和张强两人骑自行车同时从两地相对出发，王华骑到全程的(5/8)与张强相遇，张强继续以每小时12千米的速度向前骑，用2.5小时骑完余下的路程，求王华的速度．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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

<gadget id="calculator">(3/8) / (5/8)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">12 / (3/5)</gadget>
<output>20</output>

<result>20</result>