If the ratio of degrees of an obtuse angle to a right angle is 4:3, what is the degree of the obtuse angle?
一个钝角和一个直角的度数比是4：3，则钝角是多少度．
<gadget id="calculator">90 / 3</gadget>
<output>30</output>

<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<result>120</result>