A rectangular wall whose length is 4 times its width, after reconstruction, its length is reduced by 3m, its width increased by 2m, and its area increased by 14m**2. Find the original area of the wall.
一个长方形围墙，长是宽的4倍，改建后，长减少了3m，宽增加了2m，面积增加了14m**2，求围墙原来的面积．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<result>64</result>