The side length of a square is 10 cm, if it is rotated 90 degrees with one side as the axis, what is the resulting body surface area?
一个正方形的边长为10厘米，如果以它的一边为轴，旋转90度，求所得的体形表面积？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 2</gadget>
<output>157</output>

<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">3.14 * 10 * 2 * (5/2)</gadget>
<output>157</output>

<gadget id="calculator">10 * 10 * 2</gadget>
<output>200</output>

<gadget id="calculator">157 + 157 + 200</gadget>
<output>514</output>

<result>514</result>