How to use calculate an expression for each row of a data table

Hi @matheval thanks for your library works very well.

In a data table, a formula column allows you to perform calculations based on values from other columns. Let's say you have a data table with columns "Quantity" and "Price," and you want to add a formula column for "Total" (Quantity multiplied by Price). In this example, the formula in the "Total" column multiplies the corresponding values in the "Quantity" and "Price" columns.