A trapezoidal steel plate, the upper base is 9m long, the lower base is 11m long, and the height is 26dm. The average steel weight per square meter is 78 kg. How many kg does this steel plate weigh in total?
一块梯形钢板，上底长9m，下底长11m，高26dm，平均每平方米钢重78千克，这块钢板共重多少千克？
<gadget id="calculator">9 + 11</gadget>
<output>20</output>

<gadget id="calculator">26 / 10</gadget>
<output>13/5 = around 2.6</output>

<gadget id="calculator">(13/5) / 2</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">20 * (13/10) * 78</gadget>
<output>2_028</output>

<result>2_028</result>