For a trapezoidal billboard, the upper base is 7.2 meters, the lower base is 5.3 meters, and the height is 6.4 meters. If you want to paint both the front and the back, you need 0.6 kilograms of paint per square meter. How many kilograms of paint do you need?
一块梯形广告牌，上底是7.2米，下底是5.3米，高是6.4米，要给它正反都刷油漆，每平米用油漆0.6千克，要用油漆多少千克？
<gadget id="calculator">7.2 + 5.3</gadget>
<output>12.5</output>

<gadget id="calculator">6.4 / 2</gadget>
<output>3.2</output>

<gadget id="calculator">12.5 * 3.2</gadget>
<output>40</output>

<gadget id="calculator">40 * 2 * 0.6</gadget>
<output>48</output>

<result>48</result>