419687 divided by 21 
We want to divide 419687 by 21.

Let's proceed to step 1:
21 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 21

Going ahead to step 2:
The number 21 fits into 41 1 times, leaving a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 21 from 41 to get 20.
Include the next digit (9) from the dividend after 20, then repeat: 209 / 21

Advancing to step 3:
The number 21 fits into 209 9 times, leaving a remainder of 20.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
If we subtract 189 from 209, we get 20.
Include the next digit (6) from the dividend after 20, then repeat: 206 / 21

On to step 4:
206 divided by 21 is 9 with a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 199.0
If we take 189 away from 206, we end up with 17.
Fetch the next digit (8) from the dividend, attach it to 17 and continue: 178 / 21

On to step 5:
The number 21 fits into 178 8 times, leaving a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 1998.0
The remainder is 10 after subtracting 168 from 178.
Fetch the next digit (7) from the dividend, attach it to 10 and continue: 107 / 21

Step 6:
107 divided by 21 is 5 with a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 19985.0
Subtract 105 from 107 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 19985.0
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 8:
21 goes into 200 9 times with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 19985.09
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 9:
21 goes into 110 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 19985.095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 10:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 19985.0952
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 11:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 19985.09523
Deduct 63 from 80 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 12:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The next digit of our result is 8. 
Result so far: 19985.095238
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 13:
When dividing 20 by 21, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 19985.095238
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 14:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 19985.09523809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Our division results in 19985.09523809 with a remaining 1.1e-08.