Cut out the largest square from a rectangular cardboard with a length of 80 cm and a width of 70 cm, and use the remaining small rectangular cardboard to make a photo frame. What is the circumference of the photo frame in centimeters?
从一个长80厘米、宽70厘米的长方形纸板剪下一个最大的正方形，余下一个小长方形纸板，用这个小长方形纸板做一个相框，则相框的周长是多少厘米．
<gadget id="calculator">80 - 70</gadget>
<output>10</output>

<gadget id="calculator">70 + 10</gadget>
<output>80</output>

<gadget id="calculator">80 * 2</gadget>
<output>160</output>

<result>160</result>