excel 2003 formula problem

Can you upload your sheet?

Unfortunately, you have to give us more information if you want to get the right help. With the information you gave us, the only thing we can do is enter a number in a new sheet in cell F10, then in another cell do "=F10*10", and see that it works correctly.

Past this, we can only spout generic tips that sound remotely similar to this:

Are your numbers highly-accurate decimals placed in cells with the "Accuracy as shown" option enabled and few decimal-points visible?

Are there circular references?

Check if all cells have the same number format.

Check your settings for math precision options.

Etc...

Uploading an example sheet that shows your problem, or at least giving us more detail, would go a very long way towards helping us help you.

here is a copy of the file that i am working with.

thanks
Copy-of-2012-13-Trade-Waste-Char.xls

You have disabled auto calculation. Change it back to automatic:
http://www.msoffice-tutorial-training.com/excel-automatic-calculation.html

I took a look at the sheet (specifically cell H10 where "=F10*13" - the most similar formula to the one you've initially posted) and the value there is correct. Which cell is calculated incorrectly?

the formula in f11, f12 and f13 dont appear to add up.

there are a few other cells futher down that are out as well

for example f11 5.99*13 should be 77.87 but it appears in the sheet as 77.81

thanks

thank you for replying to my question - i applied your answer and it worked

many thanks