Problem: Repeating calculations

What if instead of converting one temperature from Fahrenheit to Celsius we wish to calculate a number of conversions and display a conversion table? For example:

Fahrenheit Celsius
     0       -18
    10       -13
    20        -7
    30        -2
    40         4
    50        10
    60        15
    70        21
    80        26
    90        32
   100        37

Solution:

Note the string formatting I used to make the table display cleanly.