There is a garden with a diameter of 10m somewhere on Xiahe Road, and a cement road with a width of about 2m should be built around the garden. How big is this concrete road? If the cost per square meter is 200 yuan, how much will it cost to build this road?
厦禾路某处有一个直径为10m的花园，要在花园周围建一条宽约2m的水泥路．这条水泥路有多大？如果每平方米造价200元，建这条路要花多少钱？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

<gadget id="calculator">3.14 * 49</gadget>
<output>153.86</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

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

<gadget id="calculator">153.86 - 78.5</gadget>
<output>75.36</output>

<gadget id="calculator">75.36 * 200</gadget>
<output>15_072</output>

<result>15_072</result>