kfb around - 12
k1, kfb around- 18
k2, kfb around - 24
k3, kfb around - 30
k4, kfb around - 36
Okay, you cast on 6 stitches and then knit in the front and back of each stitch on the first round.
By the way the use of the work round indicates that you should probably be doing this in the round, as in using 4 double pointed needles or some other method of working a small circumference in the round.
After that first round you knit a round where all you do is knit all the way around.
Then you knit a round of K1 and then knit in the front and the back of the next stitch and alternate those 2 directions all the way around. You then do a round of just knit.
You keep increasing every other round adding one more knit stitch between the increases. The number at the end of the line tells you how many stitches you will have at the end of that round.
If you haven't done circular knitting like this go to this page
for a free video of how to do it. Scroll down to "Small Diameter Circular Knitting". It is not all that hard, you still just work on two needles at a time, and you never have to purl. :-)