Need help learning to read chrochet chart

How-to Questions
1

I am new to crochet and I actually have a book a bought but I am having a hard time reading the charts. Here is a sample below

Row 2: Chain 3, turn, double crochet in same space, *double crochet in next 2 double crochet, 2 double crochet in next double crochet; repeat from * across.

I understand how to double crochet, but when it says 2 double crochet does it mean twice in the same chain? or what does it mean?

Thank you for you help in advance.

2

Row 2: Chain 3, turn, double crochet in same space, *double crochet in next 2 double crochet, 2 double crochet in next double crochet; repeat from * across.

Explanation: Chain 3, turn, double crochet in the same place the chain comes out of, * double crochet in the next double crochet, double crochet in the next double crochet, work 2 double crochet in the next double crochet (2 in one); repeat from the * across.

3

Thank you :knitting: