It is known that one interior angle of a quadrilateral is 90°, the second interior angle is half of the first interior angle, and the third interior angle is twice the second interior angle. Find the third interior angle.
已知一个四边形的一个内角是90°，第二个内角是第一个内角的一半，第三个内角是第二个内角的2倍，求第三个内角．
<gadget id="calculator">360 - 90</gadget>
<output>270</output>

<gadget id="calculator">1 + 2 + 2</gadget>
<output>5</output>

<gadget id="calculator">270 / 5</gadget>
<output>54</output>

<gadget id="calculator">54 * 2</gadget>
<output>108</output>

<result>108</result>