The age ratio between Xiao Wu and his father is 1:3 now. After 12 years, the age ratio between Xiao Wu and his father will be 1:2. What is Xiao Wu's current age?
小伍现在和他爸爸的年龄比是1：3，过12年后，小伍和他爸爸的年龄比将是1：2，小伍现在的年龄是多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 12</gadget>
<output>6</output>

<gadget id="calculator">12 - 6</gadget>
<output>6</output>

<gadget id="calculator">(1/2) * 3</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) - 1</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">6 / (1/2)</gadget>
<output>12</output>

<result>12</result>