The ratio of the degrees of the three angles of a triangle is 2:3:4, what is the degree of the largest angle in this triangle?
一个三角形三个角的度数比为2：3：4，这个三角形中最大角的度数是多少°．
<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">180 * (4/9)</gadget>
<output>80</output>

<result>80</result>