The planning department of the municipal government wants to build a cement road with a width of 4 meters around a circular artificial lake with a radius of 36 meters. What is the area of this cement road in square meters?
市政府规划部门要在一个半径为36米的圆形人工湖周围修一条宽为4米的水泥路，这条水泥路的面积是多少平方米？
<gadget id="calculator">36 + 4</gadget>
<output>40</output>

<gadget id="calculator">40 ** 2</gadget>
<output>1_600</output>

<gadget id="calculator">3.14 * 1_600</gadget>
<output>5_024</output>

<gadget id="calculator">36 ** 2</gadget>
<output>1_296</output>

<gadget id="calculator">3.14 * 1_296</gadget>
<output>4_069.44</output>

<gadget id="calculator">5_024 - 4_069.44</gadget>
<output>954.56</output>

<result>954.56</result>