cylindrical part has a length of 3 decimeters and a base radius of 2 decimeters. To paint its surface with red paint, 0.02 kg of paint is needed per square decimeter. How many kilograms of paint are needed to cover this part?
一个圆柱形零件的长是3分米，底面半径是2分米．将它的表面涂上红色的油漆，每平方分米需要油漆0.02千克．涂满这个零件，需要多少千克油漆？
<result>1.25</result>