The ratio of the two acute angles of a right triangle is 2:1, what is the degree of the largest acute angle?
一个直角三角形的两个锐角度数比是2：1，最大锐角的度数是多少°
<gadget id="calculator">180 - 90</gadget>
<output>90</output>

<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">90 * (2/3)</gadget>
<output>60</output>

<result>60</result>