We look at the division of 620891 by 90 
We want to figure out the number of times 620891 can be divided by 90.

Step 1:
6 divided by 90 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 90

Going ahead to step 2:
If we divide 62 by 90, we get 0 and a remainder of 62.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 62 and we're left with 62.
Fetch the next digit (0) from the dividend, attach it to 62 and continue: 620 / 90

On to step 3:
When dividing 620 by 90, we get 6 with a remainder of 80.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 540 from 620 to get 80.
Include the next digit (8) from the dividend after 80, then repeat: 808 / 90

Step 4:
90 can be fit into 808 8 times, resulting in a remainder of 88.
Write down 8 as next digit of the result. 
Result so far: 68.0
Subtracting 720 from 808 leaves us with 88.
Append the next digit (9) from the dividend to 88 and continue with: 889 / 90

Advancing to step 5:
889 divided by 90 is 9 with a remainder of 79.
Record the quotient 9 as the next digit in the result. 
Result so far: 689.0
The remainder is 79 after subtracting 810 from 889.
Grab the next digit (1) from the dividend, add it to 79, then carry on: 791 / 90

Let's proceed to step 6:
When dividing 791 by 90, we get 8 with a remainder of 71.
Put 8 as the next digit of the answer. 
Result so far: 6898.0
Subtract 720 from 791 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 7:
710 divided by 90 is 7 with a remainder of 80.
The number 7 becomes the next digit in our result. 
Result so far: 6898.7
If we subtract 630 from 710, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
The number 90 fits into 800 8 times, leaving a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 6898.78
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 9:
If we divide 800 by 90, we get 8 and a remainder of 80.
Put 8 as the next digit of the answer. 
Result so far: 6898.788
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The quotient of the division is 6898.788, and the remainder is 0.008.