The printing resolution strongly depends on size... for example for a small print, like A6 or A5, it should be IMHO 300dpi, for larger prints it can be lower, down to 100dpi at largest ones. So for your A4 it should be something about 2340x1654 (it gives 200dpi). Just take your print size (in inches) and multiply it by your printing resolution (in dpi). FYI: DPI stands for 'dots per inch'.