The sum of the two bases of a trapezoid is 12 cm and the height is 14 cm. What is the area in square decimeters?
一个梯形两个底的和是12厘米，高是14厘米，面积是多少平方分米？
<gadget id="calculator">14 / 2 / 100</gadget>
<output>7/100 = around 0.07</output>

<gadget id="calculator">12 * (7/100)</gadget>
<output>21/25 = around 0.84</output>

<result>21/25 = around 0.84</result>