The area of 24.5 square metres will only give you the minimum number of packs, not the actual number - unless you're happy to chop it up and fit in all the little pieces, like parquet, which I think defeats the whole point of laminate flooring.
One pack, for example, says that it is 2.99 square metres. That means you'll need at least 9 of them. Then look at what's in it - 12 pieces of size 0.192 metres by 1.292 metres. Now, which way round do you want to put them? With their long edges parallel to the long room edges, you'll need 6 along the way and 20 across the way, which comes to 10 packs, not 9. At right angles, it's 3 lengths across the way and 35 breadths along, so you can just do it with 9 packs after all. But the first way, if you stagger the joints you can surely manage with 9 packs too - your 22 ft length takes five full pieces and about one-fifth of the sixth piece, so if you start the next strip with the leftover part of that sixth piece, it would all come out okay.
If the pieces in your selected pack are a different size from that, you'll nhave to revise the jigsaw plan!