Practice: A and B start from point A of a square flower bed at the same time, and walk along the edge of the flower bed. A walks 40 meters per minute clockwise, and B walks 45 meters per minute counterclockwise. The two are 15 meters away from point C. Meet at meters, what is the perimeter of this flower bed?
练一练：甲、乙两人同时从正方形花坛A点出发，沿着花坛的边上走，甲顺时针每分钟走40米，乙逆时针每分钟行45米，两人在距C点15米处相遇，求这个花坛周长是多少？
<gadget id="calculator">45 + 40</gadget>
<output>85</output>

<gadget id="calculator">45 - 40</gadget>
<output>5</output>

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

<gadget id="calculator">15 * (2/5)</gadget>
<output>6</output>

<gadget id="calculator">85 * 6</gadget>
<output>510</output>

<result>510</result>