After cutting a cone with a height of 7.2 cm into two pieces with the same shape and size, the surface area increases by 86.4 cm2. Find the volume of this cone?
把一个高为7.2厘米的圆锥体切成形状大小完全相同的两块后，表面积增加86.4平方厘米，求这个圆锥体的体积？
<gadget id="calculator">3.14 * 36 * 2.4</gadget>
<output>271.296</output>

<result>271.296</result>