The upper bottom of the trapezoidal billboard is 5 meters, the lower bottom is 6 meters, and the height is 4 meters. If 2 kg of paint is used per square meter. How many kilograms of paint will be used to paint both sides of this billboard?
梯形广告牌的上底是5米，下底是6米，高是4米，如果每平方米用油漆2千克．涂抹这个广告牌的两面要用油漆多少千克？
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">11 * 2 * 2 * 2</gadget>
<output>88</output>

<result>88</result>