A red flag is planted at equal distances along the start of the runway, and there are 15 red flags at the end. The athlete reaches the 8th red flag 8 seconds after starting. If the speed remains the same, how many seconds will it take to reach the 15th red flag?
沿着跑道起点按相等距离插上一面红旗，到终点一共有15面红旗．运动员起跑后8秒到达第8面红旗，如果速度不变，一共要花多少秒才能到达第15面红旗．
<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">14 / (7/8)</gadget>
<output>16</output>

<result>16</result>