Let's divide 621139 by 45
Our goal is to divide 621139 by 45.

Going ahead to step 1:
The number 45 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 45

Moving on to step 2:
62 divided by 45 is 1 with a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 45 from 62, we get 17.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 45

Step 3:
171 divided by 45 is 3 with a remainder of 36.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we take 135 away from 171, we end up with 36.
Include the next digit (1) from the dividend after 36, then repeat: 361 / 45

Moving on to step 4:
45 goes into 361 8 times with a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 138.0
Subtract 360 from 361 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 45

Step 5:
The number 45 fits into 13 0 times, leaving a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 1380.0
Deduct 0 from 13 and we're left with 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 45

Let's proceed to step 6:
139 divided by 45 is 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 13803.0
Deduct 135 from 139 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 7:
40 divided by 45 is 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 13803.0
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
400 divided by 45 is 8 with a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 13803.08
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
400 divided by 45 is 8 with a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 13803.088
Subtract 360 from 400 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Our division results in 13803.088 with a remaining 0.004.