The father is 24 years older than the son. This year the father is five times the son's age, and how many years later the father will be three times the son's age.
爸爸比儿子大24岁，今年爸爸的年龄是儿子的五倍，多少年后爸爸的年龄是儿子的三倍．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">24 / 4</gadget>
<output>6</output>

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

<result>6</result>