If the largest square is cut out of a rectangle with a length of 12 cm and a width of 8 cm, how many square centimeters are left?
在一个长12厘米、宽8厘米的长方形中剪去一个最大的正方形，还剩下多少平方厘米？
<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>