There was a 54-meter-high tree beside the road, which was blown off when the wind was blowing, and the fracture was 15 meters from the ground. Please use calculations to explain how far away from the big tree it will be affected.
公路旁有一棵高54米的大树，在刮风时被吹断，断裂处距地面15米．请你通过计算说明在距离该大树多大范围内会受到影响．
<gadget id="calculator">54 - 15</gadget>
<output>39</output>

<gadget id="calculator">39 ** 2</gadget>
<output>1_521</output>

<gadget id="calculator">3.14 * 1_521</gadget>
<output>4_775.94</output>

<result>4_775.94</result>