There is a trapezoidal steel plate, the upper base is 2.5 decimeters long, the lower base is 5.5 decimeters long, and the height is 3.4 decimeters. If the steel plate weighs 0.75 kg per square decimeter, how much does the steel plate weigh?
有一块梯形钢板，上底长2.5分米，下底长5.5分米，高是3.4分米．如果每平方分米钢板重0.75千克，这块钢板重多少千克？
<gadget id="calculator">2.5 + 5.5</gadget>
<output>8</output>

<gadget id="calculator">3.4 / 2</gadget>
<output>1.7</output>

<gadget id="calculator">8 * 1.7 * 0.75</gadget>
<output>10.2</output>

<result>10.2</result>