Math expressions resulting in two digits

[ray]

Is it possible with math expressions to have a result of always 2 digits?

f.e. 
{{#=}}1+2{{/}} = 03 instead of just 3
{{#=}}1+10{{/}} = 11

I was trying to do a check with IF(condition,value_if_true,value_if_false) to place a "0" in front of the result when it's <10 but that didn't work out...

[Udo Brand]

I guess this is the first attempt for: https://answers.atlassian.com/questions/12917257