When grandpa's age is twice of father's age, Xiao Ming is 1 year old; when father's age is 8 times of Xiao Ming's age, grandpa is 61 years old. So how old is grandpa older than Xiao Ming?
当爷爷的年龄是爸爸年龄的2倍时，小明1岁；当爸爸的年龄是小明年龄的8倍时，爷爷61岁．那么爷爷比小明大多少岁．
<gadget id="calculator">8 * 61</gadget>
<output>488</output>

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

<gadget id="calculator">488 - (1/2) - 61</gadget>
<output>853/2 = around 426.5</output>

<gadget id="calculator">1 + (853/2)</gadget>
<output>855/2 = around 427.5</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">(1/2) + 7</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(855/2) / (15/2)</gadget>
<output>57</output>

<result>57</result>