How do I change our BD rapid flex thermometer to Fahrenheit from Celsius?

My daughter changed our thermometer to celsius. How do I change it back?How do I change our BD rapid flex thermometer to Fahrenheit from Celsius?
Begin by multiplying the Celsius temperature by 9.

Divide the answer by 5.

Now add 32.How do I change our BD rapid flex thermometer to Fahrenheit from Celsius?
Good for your daughter!! Maybe it's time you learned Celsius too! ;-)