A cylinder with a base radius of 2 cm and a height of 8 cm, if it is cut along the height into two half cylinders of equal volume, and then these two half cylinders are connected into a large half cylinder, the size of the large half cylinder What is the surface area in square centimeters?
一个圆柱体底面半径是2厘米，高8厘米，如果把它沿着高切成两个体积相等的半圆柱体，然后把这两个半圆柱体接成一个大半圆柱体，这个大半圆柱体的表面积是多少平方厘米？
<gadget id="calculator">2 * 3.14 * 2 * 8</gadget>
<output>100.48</output>

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

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

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

<gadget id="calculator">100.48 + 12.56 + 64</gadget>
<output>177.04</output>

<result>177.04</result>