An express train and a slow train travel towards each other from Nanjing and Yangzhou at the same time, and meet at a distance of 3 kilometers from the midpoint after (3/5) hours. It is known that the express train travels an average of 75 kilometers per hour, how many kilometers per hour does the slow train travel on average?
一辆快车和一辆慢车分别从南京和扬州两地同时相向而行，经过(3/5)小时在离中点3千米处相遇．已知快车平均每小时行75千米，慢车平均每小时行多少千米？
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

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

<gadget id="calculator">6 / (3/5)</gadget>
<output>10</output>

<gadget id="calculator">75 - 10</gadget>
<output>65</output>

<result>65</result>