The construction company wants to lay a 10-meter-wide circular lawn around a circular building with a radius of 30 meters. The estimated cost of turf is 5 yuan per square meter. How much is the total cost of laying the lawn?
建筑公司要在一个半径为30米的圆形建筑周围铺设10米宽的环形草坪，预计每平方米草皮费用为5元，铺设草坪总共花费多少元？
<gadget id="calculator">30 + 10</gadget>
<output>40</output>

<gadget id="calculator">3.14 * 40 * 40</gadget>
<output>5_024</output>

<gadget id="calculator">3.14 * 30 * 30</gadget>
<output>2_826</output>

<gadget id="calculator">5_024 - 2_826</gadget>
<output>2_198</output>

<gadget id="calculator">5 * 2_198</gadget>
<output>10_990</output>

<result>10_990</result>