A trapezoid, the upper base is 68 meters, the lower base is 112 meters, and the height is 45 meters. Grain and vegetables are planted on this land. The area of the grain land is twice the area of the vegetable land. What is the area of the grain land in square meters ?
一块梯形，上底是68米，下底是112米，高是45米，在这块地上种了粮食和蔬菜，粮食地的面积是蔬菜地面积的2倍，粮食地的面积是多少平方米？
<gadget id="calculator">45 / 2</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">68 * (45/2)</gadget>
<output>1_530</output>

<gadget id="calculator">112 * (45/2)</gadget>
<output>2_520</output>

<gadget id="calculator">1_530 + 2_520</gadget>
<output>4_050</output>

<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">4_050 / 3</gadget>
<output>1_350</output>

<gadget id="calculator">2 * 1_350</gadget>
<output>2_700</output>

<result>2_700</result>