The ratio of the three interior angles of a triangle is 2:5:11, what is the largest interior angle of this triangle?
一个三角形三个内角度数比是2：5：11，这个三角形最大内角是多少度．
<gadget id="calculator">2 + 5 + 11</gadget>
<output>18</output>

<gadget id="calculator">11 / 18</gadget>
<output>11/18 = around 0.611111</output>

<gadget id="calculator">180 * (11/18)</gadget>
<output>110</output>

<result>110</result>