In a triangle, the ratio of the three interior angles is 5:3:2, what is the largest angle of this triangle?
一个三角形，三个内角度数比是5：3：2，这个三角形最大的角是多少度．
<gadget id="calculator">5 + 3 + 2</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>