For a trapezoidal lawn, the sum of the upper and lower bases is 6 meters, and its area is about 5.1 square meters. About how many meters high.
一块梯形草坪，上底和下底的和是6米，它的面积约是5.1平方米．高约是多少米．
<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">5.1 * (1/3)</gadget>
<output>1.7</output>

<result>1.7</result>