We're dividing 407895 by 21 
Let's see how many times 21 fits into 407895.

On to step 1:
21 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 21

Moving on to step 2:
40 divided by 21 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 21 from 40 to get 19.
Fetch the next digit (7) from the dividend, attach it to 19 and continue: 197 / 21

On to step 3:
When dividing 197 by 21, we get 9 with a remainder of 8.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we take 189 away from 197, we end up with 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 21

Going ahead to step 4:
The number 21 fits into 88 4 times, leaving a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 194.0
If we take 84 away from 88, we end up with 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 21

Going ahead to step 5:
21 can be fit into 49 2 times, resulting in a remainder of 7.
Record the quotient 2 as the next digit in the result. 
Result so far: 1942.0
If we subtract 42 from 49, we get 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 21

Going ahead to step 6:
21 goes into 75 3 times with a remainder of 12.
The next digit of our result is 3. 
Result so far: 19423.0
Subtracting 63 from 75 leaves us 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 7:
If we divide 120 by 21, we get 5 and a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 19423.5
If we take 105 away from 120, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 8:
When dividing 150 by 21, we get 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 19423.57
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 9:
30 divided by 21 is 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 19423.571
Subtracting 21 from 30 leaves us 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.

On to step 10:
90 divided by 21 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 19423.5714
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:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The next digit of our result is 2. 
Result so far: 19423.57142
Subtract 42 from 60 to 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 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: 19423.571428
The remainder is 12 after subtracting 168 from 180.
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 13:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 19423.5714285
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.

Advancing to step 14:
If we divide 150 by 21, we get 7 and a remainder of 3.
The next digit of our result is 7. 
Result so far: 19423.57142857
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 19423.57142857, with a leftover of 3e-09.