There is a trapezoidal corn field, the upper base is 40 meters, the lower base is 70 meters, and the height is 90 meters. If each square meter of land can produce 0.95 kilograms of corn, how many kilograms of corn can this land produce in total?
有一块梯形的玉米地，上底是40米，下底是70米，高是90米．如果每平方米的地能产玉米0.95千克，这块地共能产玉米多少千克？
<gadget id="calculator">40 + 70</gadget>
<output>110</output>

<gadget id="calculator">90 / 2</gadget>
<output>45</output>

<gadget id="calculator">110 * 45 * 0.95</gadget>
<output>4_702.5</output>

<result>4_702.5</result>