pixel size changing when exported as jpg
I'm a novice and need advice. I have a photo that I need at "exactly 2100 px on the longest side and 300 ppi, uncompressed, saved with maximum image quality in jpeg".
I have set the image to these in Ai but when I export the image properties show 8751 x 4923. I have also tried to export in Lightroom with no success. Please someone tell me how to do this.
