Let's divide 621639 by 42
Our goal is to divide 621639 by 42.

Advancing to step 1:
42 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 42

Going ahead to step 2:
If we divide 62 by 42, we get 1 and a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 42 from 62 leaves us with 20.
Fetch the next digit (1) from the dividend, attach it to 20 and continue: 201 / 42

Going ahead to step 3:
42 can be fit into 201 4 times, resulting in a remainder of 33.
Write down 4 as next digit of the result. 
Result so far: 14.0
Subtract 168 from 201 to get 33.
Include the next digit (6) from the dividend after 33, then repeat: 336 / 42

Let's proceed to step 4:
42 goes into 336 8 times with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 148.0
If we subtract 336 from 336, we get 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 42

On to step 5:
3 divided by 42 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 1480.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 42

Going ahead to step 6:
When dividing 39 by 42, we get 0 with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 14800.0
Deduct 0 from 39 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 7:
When dividing 390 by 42, we get 9 with a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 14800.9
Deduct 378 from 390 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
The number 42 fits into 120 2 times, leaving a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 14800.92
Subtract 84 from 120 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 9:
360 divided by 42 is 8 with a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 14800.928
Subtracting 336 from 360 leaves us 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.

Advancing to step 10:
The number 42 fits into 240 5 times, leaving a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 14800.9285
The remainder is 30 after subtracting 210 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 11:
42 goes into 300 7 times with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 14800.92857
The remainder is 6 after subtracting 294 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 12:
When dividing 60 by 42, we get 1 with a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 14800.928571
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 13:
180 divided by 42 is 4 with a remainder of 12.
The next digit of our result is 4. 
Result so far: 14800.9285714
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 14:
The number 42 fits into 120 2 times, leaving a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 14800.92857142
Deduct 84 from 120 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

In conclusion, the division gives 14800.92857142 with a balance of 3.6e-08.