Let's divide 432899 by 21
We're looking to find how many times 21 goes into 432899.

Going ahead to step 1:
If we divide 4 by 21, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 21

Let's proceed to step 2:
43 divided by 21 is 2 with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 1 after subtracting 42 from 43.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 21

On to step 3:
12 divided by 21 is 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Deduct 0 from 12 and we're left with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 21

Moving on to step 4:
If we divide 128 by 21, we get 6 and a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 206.0
Deduct 126 from 128 and we're left with 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 21

Moving on to step 5:
21 goes into 29 1 times with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 2061.0
Deduct 21 from 29 and we're left with 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 21

Going ahead to step 6:
89 divided by 21 is 4 with a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 20614.0
If we subtract 84 from 89, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
When dividing 50 by 21, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 20614.2
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 8:
The number 21 fits into 80 3 times, leaving a remainder of 17.
The next digit of our result is 3. 
Result so far: 20614.23
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 9:
When dividing 170 by 21, we get 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 20614.238
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.

Step 10:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 20614.238
If we take 0 away from 20, we end up 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.

On to step 11:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 20614.23809
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.

Advancing to step 12:
110 divided by 21 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 20614.238095
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 13:
When dividing 50 by 21, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 20614.2380952
If we take 42 away from 50, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 14:
80 divided by 21 is 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 20614.23809523
If we take 63 away from 80, we end up 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.

The quotient of the division is 20614.23809523, and the remainder is 1.7e-08.