In a triangle, the degree ratio of the three interior angles is 1:2:6, what is the largest angle in this triangle?
一个三角形，三个内角的度数比是1：2：6，这个三角形中最大的角是多少度？
<gadget id="calculator">1 + 2 + 6</gadget>
<output>9</output>

<gadget id="calculator">6 / 9</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">180 * (2/3)</gadget>
<output>120</output>

<result>120</result>