What is the volume in cubic centimeters of a steel pipe with an outer diameter of 16 cm, an inner diameter of 10 cm, and a length of 2 m?
外直径为16厘米，内直径为10厘米，长为2米的钢管的体积是多少立方厘米．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">200.96 - 78.5</gadget>
<output>122.46</output>

<gadget id="calculator">2 * 100</gadget>
<output>200</output>

<gadget id="calculator">122.46 * 200</gadget>
<output>24_492</output>

<result>24_492</result>