If a rectangle is 9 cm long and 7 cm wide, what is the area of the square equal to its perimeter?
一个长方形长9厘米，宽7厘米，和它周长相等的正方形面积是多少平方厘米
<gadget id="calculator">9 + 7</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

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

<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>