There is a rectangular iron sheet with a length of 90 decimeters and a width of 70 decimeters. A square with a side length of 30 decimeters is cut off from the short side. What is the perimeter of the remaining iron sheet?
有一块长方形铁皮，长90分米，宽70分米，在短边上剪去一个边长30分米的正方形，剩下的铁皮周长是多少分米？
<gadget id="calculator">90 + 70</gadget>
<output>160</output>

<gadget id="calculator">160 * 2</gadget>
<output>320</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">320 + 60</gadget>
<output>380</output>

<result>380</result>