Xiaoxiao cut the largest square from a piece of rectangular paper with a length of 10cm and a width of 7cm. What is the circumference in cm?
笑笑从一张长10cm，宽7cm的长方形纸里剪一个最大的正方形，周长是多少cm
<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<result>28</result>