Mrs. Nancy Wetselaar

[Nancy Wetselaar]

*(Ch3, 2dc, 3tr, 2dc, ch 3, so st) in same stitch

I don’t understand which st is the same st.

[Tampa Doll]

The same stitch means.  The next stitch you are to use put ch3, 2dc, 3tr, 2dc, ch3, so st in that t stitch.  You will be adding 12 stitches in one stitch.

Just and example you have 3 stitches.  sc in first stitch in the next stitch you will add what is in parentheses and then sc in the next.  This is just an example.  

 

[Granny Square]

Welcome to the 'ville!  I agree with Tampa Doll, if if a pattern doesn't say which stitch, it normally/conventionally means in the next/following stitch.  If it meant somewhere else, it would have said to skip a stitch and put it in the following stitch, for example. 

I'm not sure if you are a beginner, but sometimes beginners are surprised at instructions that tell you to put several stitches into 1 stitch--this is not uncommon, you can fit a LOT of stitches into 1.  Your instruction is telling you to do 7 stitches into 1 (the 3+3 chains don't go IN the stitch in the row below, they 'float' above it).