The area of a trapezoid is 196 square centimeters, the upper base is 8 cm long, and the lower base is 12 cm longer than the upper base. What is the height of the trapezoid in cm?
一个梯形的面积是196平方厘米，上底长8厘米，下底比上底长12厘米，这个梯形的高是多少厘米．
<gadget id="calculator">8 + 8 + 12</gadget>
<output>28</output>

<gadget id="calculator">2 / 28</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">196 * (1/14)</gadget>
<output>14</output>

<result>14</result>