If the ratio of the degrees of the three interior angles of a triangle is 4:3:2, what is the largest interior angle of the triangle?
如果一个三角形三个内角的度数之比是4：3：2，那么这个三角形的最大内角是多少度．
<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>