Mini master class on baby hat with a knot

So, we will knit a hat for a baby 0-3 months with a head circumference of about 40cm. 
Yarn - 100% merino Knits Baby merino (yardage: 50g - 125m, price: 300r for 1 skein) 32g was used for 1 hat. 

The gauge on 3.5mm needles after washing: 
10cm=24.2 stitches, which is 2.42 stitches per cm. 
Needles: Chiagoo metal 

It is better to calculate your knitting gauge with a sample in advance, and if it matches mine - you can use my number of stitches. 

1. Cast on 80 stitches on ONE needle and join in the round. Knit 6 rows in garter stitch - 1 row knit, 1 row purl. 

2. Continue knitting in stockinette stitch for another 33 rows. 

3. Make decreases: divide the fabric into 4 equal parts, marking the first stitch in each part with a marker. Before each marker, slip 1 stitch, knit the second stitch, and place the slipped stitch over the knitted one (knit two together left-leaning). Knit the stitch with the marker. After each marker, knit 2 together (knit two together right-leaning). 
After the decrease row, knit 1 row in knit stitches. 

4. Repeat alternating decreases every other row: 1 row decreases, 1 row knit, until 16 stitches remain on the needles. 

5. Knit these 16 stitches in the round in knit stitches until it reaches about 10cm. 

6. Make decreases: *1 knit, 2 together, 1 knit* *repeat to the end of the row. Knit a row in knit stitches. Decreases: *2 together, 1 knit* *repeat to the end of the row. Decreases: *2 together* *repeat to the end of the row. 
In the end, 4 stitches will remain, pull them tight and weave in the ends.