Build a path with a width of 1.5 meters outside a circular flower bed. When building the path, surround it with a fence with a length of 15.7 meters. Xiaojie walked 100 times along the outside of the path. How many meters did Xiaojie walk ?
在一个圆形花坛的外面修一条宽1.5米的小路，修筑小路时，在它的内侧围上15.7米长的篱笆，小杰沿着这条小路的外侧走100圈，小杰走了多少米？
<gadget id="calculator">15.7 / 3.14 / 2</gadget>
<output>2.5</output>

<gadget id="calculator">2.5 + 1.5</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 2 * 4 * 100</gadget>
<output>2_512</output>

<result>2_512</result>