There used to be a circular flower bed with a diameter of 20 meters in the community. Lao Wang insisted on walking around the flower bed 10 times a day. Later, the community expanded this flower bed into a circular flower bed with a diameter of 25 meters. Lao Wang wanted to keep the original walking distance, how many laps would he walk every day? (Solve with ratio)
小区原来有一个直径20米的圆形花坛，老王坚持每天围绕花坛走10圈．后来小区将这个花坛扩大，变成直径25米的圆形花坛，老王想坚持原来散步的距离，每天要走多少圈？(用比例解)
<gadget id="calculator">3.14 * 20 * 10</gadget>
<output>628</output>

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">628 / 78.5</gadget>
<output>8</output>

<result>8</result>