A trapezoidal billboard has an upper base of 3.6 meters, a lower base of 7.4 meters, and a height of 2 meters. If this billboard uses 0.6 kg of paint per square meter, how much paint is needed?
一个梯形的广告牌，上底3.6米，下底7.4米，高是2米．如果这块广告牌每平方米用油漆0.6千克，需要油漆多少千克？
<gadget id="calculator">3.6 + 7.4</gadget>
<output>11</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">11 * 1 * 0.6</gadget>
<output>6.6</output>

<result>6.6</result>