How to make multiplication Stimulsoft?

Question

Programming

Good day everyone!
Please tell me how to do calculations in Stimulsoft?
I pass two values ​​to the generator: quantity 20,000 and unit price 593.22. Values ​​in double columns.
And nothing happens :( I've already looked at both the video and the manual ... It seems everything is simple {UPD_Table.kol_vo * UPD_Table.price}, but either this error:

error CS0019: Оператор "*" не может применяться к операндам типа "string" и "double"'

or just "0".
Can anyone come across?
Thanks in advance!

Answer 1

{(double)UPD_Table.kol_vo * (double)UPD_Table.price} - either saves or throws out a more detailed message.
What version of the reporter?

Answer 2

Your quantity is not a number, but a text.

Answer 3

Convert.ToDouble();