The sum of the ages of the two brothers is 27 years old. If the elder brother's age is subtracted by 2 years, then the age ratio of the elder brother to the younger brother is 3:2. How old is the elder brother now?
兄弟两人年龄之和为27岁，如果哥哥的年龄减2岁，那么哥哥与弟弟的年龄之比为3：2，哥哥现在是多少岁．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) * 27</gadget>
<output>81/2 = around 40.5</output>

<gadget id="calculator">2 + (81/2)</gadget>
<output>85/2 = around 42.5</output>

<gadget id="calculator">1 + (3/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(85/2) / (5/2)</gadget>
<output>17</output>

<result>17</result>