Numeric keypad adding a 9 before each number

Hi everyone,

In Excel when I enter numbers on the numeric keypad, the keyboard adds a "9" in front of the numbers. In this example I typed "1236" but "91929396" is what appears. This is not happening on the top row of numbers.

Screen Shot 2021-02-04 at 1.34.21 pm.png

The result is this:

Screen Shot 2021-02-04 at 1.34.42 pm.png

My cat walked across my keyboard and this is the result!

If anyone has any idea how to fix this I'd be in your debt.

Thanks.