Why is Excel changing the number I type in?

Just the other day, I opened up Excel and started typing in some numbers to add up.

18546
2523485
36500

Then I looked at my screen, and Excel is showing this:


 

What's up with that? It looked like my numbers were getting divided by 100. Then I realized it was adding a decimal to the last two digits, like using a ten-key!

I quickly found the answer, which lies in Excel's advanced settings.

Go to File > Options > Advanced

Uncheck the box "Automatically insert a decimal point", and you're done!

Boom!