For round 2, crochet 6 increase stitches. Crocheters love abbreviations, so in pattern speak, that's written as:
Round 2: inc x 6 (12)
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How does 6 = 12?
For round 2, you crocheted 6 increase stitches.
inc x 6
Since 1 increase stitch = 2 single crochet stitches in the same stitch, 1 increase stitch counts as 2 stitches. Which means the pattern could've also been written like this:
[2 single crochet stitches in the same stitch] x 6
2 stitches x 6 = 12 total stitches
Hooray for math! 🤓