Xiao Ming is 15 years old this year, 30 years younger than her father. After 5 years, Xiao Ming's age will be her father's age ((())/(()))?
小明今年15岁，比她爸爸小30岁，5年后小明的年龄是她爸爸年龄的((())/(()))？
<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<gadget id="calculator">30 + 15 + 5</gadget>
<output>50</output>

<gadget id="calculator">20 / 50</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>