To run:
Start up.
Put 21 into a kelvin temperature.
Show the kelvin temperature in various temperature scales.
Wait for the escape key.
Shut down.

A temperature is a fraction.
A kelvin temperature is a temperature.
A celsius temperature is a temperature.
A rankine temperature is a temperature.
A fahrenheit temperature is a temperature.

To convert a kelvin temperature to a celsius temperature:
Put the kelvin temperature minus 273-15/100 into the celsius temperature.

To convert a kelvin temperature to a rankine temperature:
Put the kelvin temperature times 9/5 into the rankine temperature.

To convert a kelvin temperature to a fahrenheit temperature:
Convert the kelvin temperature to a rankine temperature.
Put the rankine temperature minus 459-67/100 into the fahrenheit temperature.

To show a temperature given a temperature scale string:
Write the temperature scale then " = " then the temperature then " degrees" on the console.

To show a kelvin temperature in various temperature scales:
Convert the kelvin temperature to a celsius temperature.
Convert the kelvin temperature to a fahrenheit temperature.
Convert the kelvin temperature to a rankine temperature.
Show the kelvin temperature given "K".
Show the celsius temperature given "C".
Show the fahrenheit temperature given "F".
Show the rankine temperature given "R".