The degree-to-degree ratio of the four corners of a trapezoid is 1:2:4:5, what is the largest internal angle of the trapezoid?
一个梯形四个角的度数比是1：2：4：5，这个梯形最大的内角度数是多少°
<gadget id="calculator">1 + 2 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">360 * (5/12)</gadget>
<output>150</output>

<result>150</result>