418384 ÷ 21 
We want to divide 418384 by 21.

Going ahead to step 1:
4 divided by 21 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 21

Step 2:
21 can be fit into 41 1 times, resulting in a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 21 from 41, we get 20.
Grab the next digit (8) from the dividend, add it to 20, then carry on: 208 / 21

Going ahead to step 3:
The number 21 fits into 208 9 times, leaving a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtract 189 from 208 to get 19.
Bring next digit (3) of the dividend behind the 19 and repeat the process: 193 / 21

On to step 4:
193 divided by 21 is 9 with a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 199.0
If we take 189 away from 193, we end up with 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 21

Advancing to step 5:
48 divided by 21 is 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 1992.0
If we take 42 away from 48, we end up with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 21

Step 6:
21 can be fit into 64 3 times, resulting in a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 19923.0
Subtract 63 from 64 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
21 goes into 10 0 times with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 19923.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
When dividing 100 by 21, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 19923.04
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 9:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 19923.047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 10:
The number 21 fits into 130 6 times, leaving a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 19923.0476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 11:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 19923.04761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 12:
When dividing 190 by 21, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 19923.047619
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 13:
If we divide 10 by 21, we get 0 and a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 19923.047619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 14:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 19923.04761904
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 19923.04761904, and the remainder is 1.6e-08.