Translations:Question types/78/en
From LimeSurvey Manual
This question type lets the author create an equation (e.g., a calculation or tailored report) and save it in a database variable. Equations can use any syntax supported by ExpressionScript. If you are handling numeric values make sure that you use the advanced question setting "Numbers only" as explained below.
You may find below an example on how to use this question type:


Example: Limesurvey_survey_BMIsample.lss.zip.