The ratio of the three interior angles of a triangle is 2:3:7, what is the largest angle in the triangle? Divided by angle, what kind of triangle is this?
三角形三个内角度数的比为2：3：7，三角形中最大的角是多少度？按角分，这是一个什么三角形？
<gadget id="calculator">2 + 3 + 7</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">180 * (7/12)</gadget>
<output>105</output>

<result>105</result>