Xiaofei wears single-row roller skates, keeps a distance of 30 cm between his feet, and slides a circle along a track with a radius of 50 meters. How many meters will the outer pulley run longer than the inner pulley?
小飞穿单排轮旱冰鞋，两脚间保持30厘米的距离，沿半径50米的跑道滑一圈，则外部滑轮比内部滑轮大约多跑多少米？
<gadget id="calculator">3.14 * 2 * 0.3</gadget>
<output>1.884</output>

<result>1.884</result>