Wang Qiang is 8 years old, and his father is 34 years old. After many years, his father's age will be three times Wang Qiang's age.
王强年龄8岁，他父亲已经34岁了，再过多少年，父亲的年龄是王强年龄的3倍．
<gadget id="calculator">34 - 8</gadget>
<output>26</output>

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

<gadget id="calculator">26 / 2</gadget>
<output>13</output>

<gadget id="calculator">13 - 8</gadget>
<output>5</output>

<result>5</result>