cylindrical fuel tank without a cover has a bottom radius of 6 decimeters and a height of 0.8 decimeters. If the surface of the fuel tank is to be painted with paint, what is the area of the painted part?
一个圆柱形无盖油箱，底面半径是6分米，高是0.8分米，要把这个油箱的表面涂上油漆，涂油漆部分的面积是多少？
<gadget id="calculator">2 * 3.14 * 6 * 0.8</gadget>
<output>30.144</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<gadget id="calculator">30.144 + 113.04</gadget>
<output>143.184</output>

<result>143.184</result>