Five years ago, Dad's age was 5 times that of Rarity's. Five years later, the combined age of Dad and Rarity is 64 years old. How old is Dad this year?
五年前，爸爸的年龄是瑞瑞的5倍，五年后，爸爸与瑞瑞年龄的和是64岁，今年爸爸多少岁？
<gadget id="calculator">64 - 5 - 5</gadget>
<output>54</output>

<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<gadget id="calculator">54 / 6</gadget>
<output>9</output>

<gadget id="calculator">5 * 9</gadget>
<output>45</output>

<gadget id="calculator">5 + 45</gadget>
<output>50</output>

<result>50</result>