The school plans to lay a lawn with a width of 3 meters outside the circular flag platform with a diameter of 14 meters. Please calculate the area of the lawn?
学校准备在直径为14米的圆形旗台外面铺一条宽3米的草坪，请计算一下草坪的面积？
<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 + 3</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

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

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

<gadget id="calculator">314 - 153.86</gadget>
<output>160.14</output>

<result>160.14</result>