A piece of trapezoidal paper, the upper base is 10cm, the lower base is 14cm, and the height is 8cm. Cut it into the largest parallelogram, and find the total area of the remaining scraps of paper.
一张梯形的纸，上底是10cm，下底是14cm，高是8cm，把它剪成一个最大的平行四边形，求余下的碎纸屑的总面积．
<gadget id="calculator">14 - 10</gadget>
<output>4</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>