cylinder is painted with paint on its surface area. It is known that the radius of the base of the cylinder is 3 cm and the length is 2 meters. If 1g of paint can cover 5 square centimeters, how many grams of paint are needed?
一个圆柱子，将它的表面积刷上油漆，已知圆柱的底面半径是3厘米，长是2米．如果1g的油漆能刷5平方厘米，需要油漆多少克？
<gadget id="calculator">2 * 100</gadget>
<output>200</output>

<gadget id="calculator">200 / 5</gadget>
<output>40</output>

<gadget id="calculator">3.14 * 3 * 2 * 40</gadget>
<output>753.6</output>

<result>753.6</result>