After the length and width of a rectangle are increased by 3cm, the area increases by 75cm**2. What is the original circumference in cm.
一个长方形长宽各增加3cm后，面积增加75cm**2．原来的周长是多少cm．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">75 - 9</gadget>
<output>66</output>

<gadget id="calculator">66 / 3</gadget>
<output>22</output>

<gadget id="calculator">22 * 2</gadget>
<output>44</output>

<result>44</result>