A cylindrical pool is pasted with tiles on the inner wall and bottom of the pool. The diameter of the bottom of the pool is 8 meters and the depth of the pool is 1 meter. How many square meters is the tiled area?
一个圆柱形水池，是在水池内壁和底面贴上瓷砖，水池底面直径8米，池深1米．贴瓷砖的面积是多少平方米？
<gadget id="calculator">3.14 * 8 * 1</gadget>
<output>25.12</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">25.12 + 50.24</gadget>
<output>75.36</output>

<result>75.36</result>