If an isosceles triangle is rotated around its base, a body of revolution is obtained. Find the volume of this body of revolution? (cm) (waist length 5, height 3, bottom edge 8)
一个等腰三角形，绕它的底边旋转一周，得到一个旋转体，求这个旋转体的体积？(厘米)(腰长5，高3，底边8)
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 8</gadget>
<output>75.36</output>

<result>75.36</result>