The circumference of a pond is 251.2 meters. The pond is surrounded by a path with a width of 5 meters. How many meters is the railing on the outside of the road?
一个池塘的周长是251.2米，池塘周围是一条5米宽的小路，在路外侧围栏杆长多少米？
<gadget id="calculator">251.2 / 3.14 / 2</gadget>
<output>40</output>

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

<gadget id="calculator">3.14 * 2 * 45</gadget>
<output>282.6</output>

<result>282.6</result>