Cast all your stitches onto one needle
Evenly distribute the stitches onto the stated number of needles, in this case four. Starting with the first cast-on stitch, slip a quarter of the stitches onto a new needle. Repeat this until you have the same amount of stitches on each needle. You may want to place a round stitch marker between the last two stitches on the last needle to indicate the beginning of the round.