For the next round, work 2 sc into each stitch (for a total of 12 stitches in the round).
For the third round, sc 1 and then work 2 sc into the next stitch (18 stitches in the round).
For the fourth round, sc 2 and then work 2 sc into the next stitch (24 stitches in the round).
And so on and so forth, sc 3 and then work 2 sc in the next stitch for the following round, sc 4 and then work 2 sc in the next stitch for the round after that, sc 5 and then 2 sc in the round after that… until your circle is as big as you want the base of your crochet basket to be.