Calculating in Userform

Hello everyone,

Am looking for a solution to the following problem in Excel VBA.
How can I program cq code the following formula and assign that code to a commandbutton (Calculate) on a userform ?

The formula is 1/SQRT(24)*10

(24) is a value from a combobox (Scale) on the same userform and 10 is a value from a textbox (Ship speed) on that userform.
I would like to have the result of the calculation shown in yet another textbox (Model ship speed) on that userform.
2,04 is the correct answer but I can't get it in that textbox through programming.
Any suggestions are more than welcome as it has me flabbergasted.

Thanks in advance,
Dirk Smit

[ATTACH]userform.jpg[/ATTACH]

@Norie,

Thanks for the swift reply. It worked like a treat. And thanks also for adding the Round function.

Best regards, Dirk