The cross section of a canal is trapezoidal, the upper mouth is 4.5 meters wide, the lower bottom is 2.1 meters wide, and the cross-sectional area is 7.92 square meters. How deep is this canal in meters?
一条水渠的横截面是梯形，上口宽4.5米，下底宽2.1米，横截面的面积是7.92平方米，这条水渠的深是多少米？
<gadget id="calculator">4.5 + 2.1</gadget>
<output>6.6</output>

<gadget id="calculator">2 / 6.6</gadget>
<output>0.30303</output>

<gadget id="calculator">7.92 * 0.30303</gadget>
<output>2.399998</output>

<result>2.399998</result>