A rectangle and a square have the same area. The side length of the square is 8 cm and the width of the rectangle is 4 cm. What is the perimeter of the rectangle in cm?
一个长方形和一个正方形的面积相等．正方形的边长是8厘米，长方形的宽是4厘米，这个长方形的周长是多少厘米？
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<gadget id="calculator">16 + 4</gadget>
<output>20</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<result>40</result>