Divide a flat angle into three angles according to 5:2:3, what is the largest angle among them?
把一个平角按5：2：3分成三个角，其中最大的角是多少．
<gadget id="calculator">5 + 2 + 3</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">180 * (1/2)</gadget>
<output>90</output>

<result>90</result>