395484 divided by 21 
We want to figure out the number of times 395484 can be divided by 21.

Going ahead to step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 21

Advancing to step 2:
21 goes into 39 1 times with a remainder of 18.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 21 from 39 to get 18.
Bring next digit (5) of the dividend behind the 18 and repeat the process: 185 / 21

Going ahead to step 3:
The number 21 fits into 185 8 times, leaving a remainder of 17.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
If we subtract 168 from 185, we get 17.
Append the next digit (4) from the dividend to 17 and continue with: 174 / 21

Advancing to step 4:
When dividing 174 by 21, we get 8 with a remainder of 6.
The next digit of our result is 8. 
Result so far: 188.0
Subtracting 168 from 174 leaves us with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 21

Let's proceed to step 5:
68 divided by 21 is 3 with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 1883.0
If we subtract 63 from 68, we get 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 21

Step 6:
When dividing 54 by 21, we get 2 with a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 18832.0
The remainder is 12 after subtracting 42 from 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 7:
120 divided by 21 is 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 18832.5
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 8:
The number 21 fits into 150 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 18832.57
If we subtract 147 from 150, we 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.

Step 9:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 18832.571
Deduct 21 from 30 and we're left 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:
If we divide 90 by 21, we get 4 and a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 18832.5714
If we subtract 84 from 90, we get 6.
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 11:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 18832.57142
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.

Advancing to step 12:
If we divide 180 by 21, we get 8 and a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 18832.571428
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
120 divided by 21 is 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 18832.5714285
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.

Going ahead to step 14:
21 goes into 150 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 18832.57142857
Subtracting 147 from 150 leaves us 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 result is 18832.57142857 with a remainder of 3e-09.