The tombstone of the Greek mathematician Diophantus (3rd-4th century A.D.) records: "One-sixth of his life was a happy childhood; after living one-twelfth of his life, his cheeks grew a thin beard; he married, and lived another seventh of his life, and five years later, he had a son, and was happy; but the son lived only half his father's full age; , he passed away after four years of extreme grief." Please answer: 1. His age when he got married; 2. His age when he became a father; 3. His age when he died.
希腊数学家丢番图(公元3--4世纪)的墓碑上记载着："他生命的六分之一是幸福的童年；再活了他寿命的十二分之一，两颊长起了细细的胡须；他结了婚，又度过了一生的七分之一，再过五年，他有了儿子，感到很幸福；可是儿子只活了他父亲全部年龄的一半；儿子死后，他在极度悲痛中度过了四年，也与世长辞了．"请回答：1他结婚时的年龄；2他开始当爸爸时的年龄；3他去世时的年龄．
<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/6) - (1/12) - (1/7) - (1/2)</gadget>
<output>3/28 = around 0.107143</output>

<gadget id="calculator">9 / (3/28)</gadget>
<output>84</output>

<gadget id="calculator">84 * 1</gadget>
<output>84</output>

<result>84</result>