A section of cylindrical hollow steel pipe with a length of 1m has a cross-sectional outer diameter of 10cm and a wall thickness of 2cm. What is the volume of this hollow steel pipe?
一段长1m的圆柱形空心钢管，截面外直径是10cm，壁厚2cm，这段空心钢管的体积是多少？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">25 - 9</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 1 * 100</gadget>
<output>5_024</output>

<result>5_024</result>