The length of a rectangle is 4 cm and the width is 3 cm. If both the length and width of the rectangle are increased by 3 cm, how much does the perimeter of the rectangle increase?
一个长方形的长是4厘米，宽是3厘米，如果这个长方形的长和宽都增加3厘米，那么这个长方形的周长增加了多少？
<gadget id="calculator">4 + 3 + 3 + 3</gadget>
<output>13</output>

<gadget id="calculator">13 * 2</gadget>
<output>26</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">26 - 14</gadget>
<output>12</output>

<result>12</result>