We look at the division of 620844 by 90 
Our goal is to divide 620844 by 90.

Let's proceed to step 1:
90 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 90

Let's proceed to step 2:
If we divide 62 by 90, we get 0 and a remainder of 62.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 62 to get 62.
Append the next digit (0) from the dividend to 62 and continue with: 620 / 90

Going ahead to step 3:
90 goes into 620 6 times with a remainder of 80.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 80 after subtracting 540 from 620.
Fetch the next digit (8) from the dividend, attach it to 80 and continue: 808 / 90

Step 4:
90 goes into 808 8 times with a remainder of 88.
The next digit of our result is 8. 
Result so far: 68.0
If we subtract 720 from 808, we get 88.
Fetch the next digit (4) from the dividend, attach it to 88 and continue: 884 / 90

Advancing to step 5:
When dividing 884 by 90, we get 9 with a remainder of 74.
Use 9 as the next digit of our solution. 
Result so far: 689.0
The remainder is 74 after subtracting 810 from 884.
Take the next digit (4) from the dividend and append it to 74, then repeat: 744 / 90

Step 6:
90 goes into 744 8 times with a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 6898.0
Deduct 720 from 744 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 7:
90 can be fit into 240 2 times, resulting in a remainder of 60.
The next digit of our result is 2. 
Result so far: 6898.2
Subtract 180 from 240 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 8:
The number 90 fits into 600 6 times, leaving a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 6898.26
Subtracting 540 from 600 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The next digit of our result is 6. 
Result so far: 6898.266
The remainder is 60 after subtracting 540 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final outcome is 6898.266, with a leftover of 0.006.