640622 divided by 8 
We're looking to find how many times 8 goes into 640622.

Step 1:
8 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 8

Step 2:
64 divided by 8 is 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtract 64 from 64 to get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 8

Moving on to step 3:
When dividing 0 by 8, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 80.0
Subtracting 0 from 0 leaves us with 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 8

Going ahead to step 4:
If we divide 6 by 8, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 800.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 8

Moving on to step 5:
8 can be fit into 62 7 times, resulting in a remainder of 6.
The next digit of our result is 7. 
Result so far: 8007.0
If we take 56 away from 62, we end up with 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 8

Let's proceed to step 6:
62 divided by 8 is 7 with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 80077.0
If we subtract 56 from 62, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
If we divide 60 by 8, we get 7 and a remainder of 4.
The next digit of our result is 7. 
Result so far: 80077.7
Deduct 56 from 60 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
8 can be fit into 40 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 80077.75
If we take 40 away from 40, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
When dividing 0 by 8, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 80077.75
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
8 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 80077.75
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 80077.75 and a remainder of 0.0.