/sci/ - Science & Math

I'm not really a math guy but signed up for some security stuff. In particular I'm confused with some encryption stuff involving permutations in pic related.
I know we start with a 64 bit key (represented in binary) to do the permutation in pic related and it returns 56 bits, but when I'm looking at websites like this one https://paginas.fe.up.pt/~ei10109/ca/des.html
What's got me is that In the example on that website, after doing the permutation with that 7x8 grid they give a 64 bit value as such: 00000000 00000000 11111111 11110000 11001100 11110000 00000000 11110000
How did they keep the entire 64 bits instead of just the 56? Where did the other 8 numbers go?