We're dividing 619890 by 21 
Our goal is to divide 619890 by 21.

Moving on to step 1:
When dividing 6 by 21, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 21

On to step 2:
21 can be fit into 61 2 times, resulting in a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 42 from 61 to get 19.
Grab the next digit (9) from the dividend, add it to 19, then carry on: 199 / 21

Step 3:
21 goes into 199 9 times with a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
The remainder is 10 after subtracting 189 from 199.
Include the next digit (8) from the dividend after 10, then repeat: 108 / 21

Advancing to step 4:
If we divide 108 by 21, we get 5 and a remainder of 3.
Put 5 as the next digit of the answer. 
Result so far: 295.0
The remainder is 3 after subtracting 105 from 108.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 21

Let's proceed to step 5:
If we divide 39 by 21, we get 1 and a remainder of 18.
The next digit of our result is 1. 
Result so far: 2951.0
Subtract 21 from 39 to get 18.
Grab the next digit (0) from the dividend, add it to 18, then carry on: 180 / 21

Going ahead to step 6:
The number 21 fits into 180 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 29518.0
Deduct 168 from 180 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.

Step 7:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 29518.5
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 8:
When dividing 150 by 21, we get 7 with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 29518.57
Subtract 147 from 150 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 9:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 29518.571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 10:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 29518.5714
Subtracting 84 from 90 leaves us with 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 11:
If we divide 60 by 21, we get 2 and a remainder of 18.
The next digit of our result is 2. 
Result so far: 29518.57142
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 12:
When dividing 180 by 21, we get 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 29518.571428
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.

Let's proceed to step 13:
21 goes into 120 5 times with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 29518.5714285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 14:
The number 21 fits into 150 7 times, leaving a remainder of 3.
The next digit of our result is 7. 
Result so far: 29518.57142857
If we take 147 away from 150, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final outcome is 29518.57142857, with a leftover of 3e-09.