The total length of a standard runway is 400 meters, the radius of the innermost circle of the curve is 36 meters, and each runway is 1.2 meters wide. There are currently 8 tracks. If you want to run an 800-meter race, the runners in the second track will be bigger than those in the first track. How many meters ahead of the starting line.
一个标准跑道的全长是400米，弯道最内圈半径是36米，每条跑道宽1.2米，现有8个跑道，如果要进行800米赛跑，第2道运动员要比第1道运动员的起跑线提前多少米．
<gadget id="calculator">36 + 1.2</gadget>
<output>37.2</output>

<gadget id="calculator">2 * 3.14 * 37.2</gadget>
<output>233.616</output>

<gadget id="calculator">2 * 3.14 * 36</gadget>
<output>226.08</output>

<gadget id="calculator">233.616 - 226.08</gadget>
<output>7.536</output>

<gadget id="calculator">7.536 * 2</gadget>
<output>15.072</output>

<result>15.072</result>