Creating your own numerical variables doesn’t differ very much from creating the text ones – the name and input text are fundamental here as well. What is an additional feature, though, is mathematical operations.

As usual, choose such a name for your variable that lets you know what value it gives back to you.

**EXAMPLE 1:** Your data source features only prices with VAT not included, and you’ve decided to create a variable that does include VAT. The equation will look like this –* price*1.21*.

Enter the equation as your **input text** **(1.)**. The preview will show you the supplemented equation **(2.)** as well as its result **(3.)**.

You can read more about variables on our blog.