Cars A and B leave opposite directions at the same time from east and west respectively. It is known that A travels in 10 hours and B travels in 15 hours. It is also known that the distance between the two cars is 58 kilometers from the midpoint. How many miles is the inter-ground highway?
甲、乙两车分别从东西两地同时相向开出，已知甲行完全程需要10小时，乙行完全程需要15小时，又知两车相遇时距离中点58千米，甲、乙两地间公路长多少千米？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

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

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / (1/5)</gadget>
<output>10</output>

<gadget id="calculator">58 * 10</gadget>
<output>580</output>

<result>580</result>