The two right-angled sides of a right-angled triangle are 15cm and 20cm, respectively, and the 15cm-long right-angled side is rotated once as the axis. What is the volume of the obtained figure in cubic centimeters?
一直角三角形的两条直角边分别为15cm和20cm，以15cm长的直角边为轴旋转一周，所得到的图形的体积是多少立方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 ** 2</gadget>
<output>400</output>

<gadget id="calculator">(1/3) * 3.14 * 400 * 15</gadget>
<output>6_280</output>

<result>6_280</result>