The ratio of degrees of an obtuse angle to a right angle is 8:5, what is the degree of the obtuse angle?
一个钝角和直角的度数比是8：5，这个钝角是多少度．
<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">(8/5) * 90</gadget>
<output>144</output>

<result>144</result>