Grandpa's age is twice that of father's, 20 years less, father's age is three times that of Xiaohua's sister, Xiaohua's sister is exactly twice that of Xiaohua's, and Xiaohua is 8 years younger than her sister, so what is the age of grandpa? ?
爷爷的年龄是爸爸的2倍少20岁，爸爸的年龄是小华姐姐的3倍，小华姐姐的年龄正好是小华的2倍，小华比姐姐小8岁，那么爷爷的年龄是多少？
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">8 / 1</gadget>
<output>8</output>

<gadget id="calculator">8 * 2 * 3 * 2</gadget>
<output>96</output>

<gadget id="calculator">96 - 20</gadget>
<output>76</output>

<result>76</result>