Women's 100-meter hurdles, the distance from the starting point to the first hurdle is 13 meters, the distance between the first hurdle and the tenth hurdle is equal, and the distance between the tenth hurdle and the end point is 10.5, find the distance between every two hurdles What is the distance in meters?
女子100米跨栏，从起点至第一栏的距离是13米，第一栏到第十栏，每相邻之间的距离相等，第十栏到终点的距离是10.5，求每两栏之间的距离是多少米？
<gadget id="calculator">100 - 13 - 10.5</gadget>
<output>76.5</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">76.5 / 9</gadget>
<output>8.5</output>

<result>8.5</result>