I think you’re looking for custom expressions in handlebars, like https://docs.celigo.com/hc/en-us/community/posts/360076358972-FAQ-How-can-I-use-handlebars-to-divide-multiply-then-generate-a-percentage-value- . If we added a math helper to the templating engine, you’d be able to do this ( https://handlebarsjs.com/guide/expressions.html#helpers )