A trapezoidal steel plate. The upper bottom is 0.6 meters, the lower bottom is 1.4 meters, and the height is 0.8 meters. If the steel plate weighs 35 kilograms per square meter, how many kilograms does this steel plate weigh?
一块梯形钢板．上底0.6米，下底1.4米，高0.8米，如果每平方米钢板重35千克，这块钢板重多少千克？
<gadget id="calculator">0.6 + 1.4</gadget>
<output>2</output>

<gadget id="calculator">0.8 / 2</gadget>
<output>0.4</output>

<gadget id="calculator">2 * 0.4 * 35</gadget>
<output>28</output>

<result>28</result>