Xiaohua has a piece of handmade paper with a side length of 4 decimeters. The side length of Xiaowei’s square handmade paper is 12 cm shorter than Xiaohua’s. How many square centimeters is Xiaohua’s handmade paper larger than Xiaowei’s?
小华有一张边长4分米的手工纸，小伟的一张正方形手工纸边长比小华的短12厘米，小华的手工纸比小伟的大多少平方厘米？
<gadget id="calculator">4 * 10 * 4 * 10</gadget>
<output>1_600</output>

<gadget id="calculator">28 * 28</gadget>
<output>784</output>

<gadget id="calculator">1_600 - 784</gadget>
<output>816</output>

<result>816</result>