A cylinder-shaped cistern has a bottom diameter of 10 meters and a depth of 2 meters measured from the inside. The inner wall and bottom of the tank are plastered with cement. What is the area of the cemented part in square meters?
一个圆柱体形的蓄水池，从里面量底面直径10米，深2米，在它的内壁与底面抹上水泥，抹水泥部分的面积是多少平方米？
<gadget id="calculator">3.14 * 10 * 2</gadget>
<output>62.8</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">62.8 + 78.5</gadget>
<output>141.3</output>

<result>141.3</result>