When Xiaohong measured the angle, he mistook the outer scale of the protractor for the inner scale, and read 130 degrees. What is the correct degree of this angle?
小红量角时，误把量角器的外圈刻度当成内圈刻度，读的度数为130度，这个角的正确度数是多少．
<gadget id="calculator">180 - 130</gadget>
<output>50</output>

<result>50</result>