This year, the father is 36 years old, and the son is 8 years old. How many years later, the son's age will be the father's age (5/12).
今年父亲36岁，儿子8岁，多少年后儿子的年龄是爸爸年龄的(5/12)．
<gadget id="calculator">36 - 8</gadget>
<output>28</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1 - (5/12)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">28 / (7/12)</gadget>
<output>48</output>

<gadget id="calculator">48 - 36</gadget>
<output>12</output>

<result>12</result>