The ratio of the three interior angles of a triangle is 2:3:5, what is the largest angle of this triangle? What kind of triangle is it?
一个三角形的三个内角度数的比是2：3：5，这个三角形最大角是多少度？是个什么三角形？
<gadget id="calculator">2 + 3 + 5</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">180 * (1/2)</gadget>
<output>90</output>

<result>90</result>