Two freighters, the Yangtze River and the Yellow River, traveled towards each other from floods A and B, which were 500 kilometers apart, and they met after 8 hours. The sailing speed of the Yangtze River is 50 kilometers per hour, how many meters per hour does the cargo ship of the Yellow River travel?
长江、黄河号两货轮，分别从相距500千米的甲、乙两洪相向而行，8小时后两相遇．长江号的航行速度为每小时50千米，黄河号货轮每小时航行多少米？
<gadget id="calculator">500 / 8</gadget>
<output>125/2 = around 62.5</output>

<gadget id="calculator">(125/2) - 50</gadget>
<output>25/2 = around 12.5</output>

<result>25/2 = around 12.5</result>