The length of the rectangle is 25 cm and the width is 19 cm. Cut out a largest square from it. What is the perimeter of the square in cm?
长方形的长是25厘米，宽是19厘米，从中剪一个最大的正方形，正方形的周长是多少厘米．
<gadget id="calculator">19 * 4</gadget>
<output>76</output>

<result>76</result>