Grandpa is 64 years old this year, which is 8 times of Xiaoya's age. Dad's age is 4 times of Xiaoya's. How old is dad this year?
爷爷今年64岁，是小亚年龄的8倍，爸爸的年龄是小亚的4倍，爸爸今年多少岁？
<gadget id="calculator">64 / 8</gadget>
<output>8</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>