|type = {{subst:number format/type|Expression error: Unrecognized punctuation character "{".}}
|arabic = {{subst:number format/convert to arabic|Expression error: Unrecognized punctuation character "{".}}
|roman = {{subst:number format/convert to roman|Expression error: Unrecognized punctuation character "{".}}
|written = {{subst:number format/convert to written|Expression error: Unrecognized punctuation character "{".}}
|unknown action
}}Performs a simple ParserFunctions-based mathematical operation given two numbers (between zero and fifty) and an output format. (The output on this page is broken for technical reasons.)
{{subst:number format math|2|+|2|arabic}} <!-- outputs "4" -->
{{subst:number format math|two|*|2|roman}} <!-- outputs "IV" -->
{{subst:number format math|2|/|II|written}} <!-- outputs "one" -->