round steel with a bottom diameter of 20 cm is cut into two identical round steel sections. The sum of the surface areas of the two sections is 7536 square centimeters. What is the volume of the original round steel in cubic centimeters?
底面直径是20厘米的圆钢，将其截成两段同样的圆钢，两段表面积的和为7536平方厘米，原来圆钢的体积是多少立方厘米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 4</gadget>
<output>1_256</output>

<gadget id="calculator">7_536 - 1_256</gadget>
<output>6_280</output>

<gadget id="calculator">6_280 / 3.14 / 20</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 100</gadget>
<output>31_400</output>

<result>31_400</result>