A rectangle with a width of 3 cm, if the length and width are increased by 3 cm, the area will increase by 81 cm2; if the length and width are both reduced by 2 cm, then the area will be reduced by how many cm2.
一个宽是3厘米的长方形，如果将长和宽都增加3厘米，那么面积增加81平方厘米；如果将长和宽都减少2厘米，那么面积减少多少平方厘米．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">81 - 9</gadget>
<output>72</output>

<gadget id="calculator">72 / 3</gadget>
<output>24</output>

<gadget id="calculator">24 - 3</gadget>
<output>21</output>

<gadget id="calculator">21 * 3</gadget>
<output>63</output>

<gadget id="calculator">21 - 2</gadget>
<output>19</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">19 * 1</gadget>
<output>19</output>

<gadget id="calculator">63 - 19</gadget>
<output>44</output>

<result>44</result>