A trapezoidal wheat field has an area of 720m**2, its upper base is 23m, and its lower base is 25m. What is the height of this wheat field in m?
一块梯形麦田，它的面积是720m**2，上底是23m，下底是25m，这块麦田的高是多少m．
<gadget id="calculator">23 + 25</gadget>
<output>48</output>

<gadget id="calculator">2 / 48</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">720 * (1/24)</gadget>
<output>30</output>

<result>30</result>