Let's divide 21390435 by 824
Our goal is to divide 21390435 by 824.

Step 1:
The number 824 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 824

Let's proceed to step 2:
824 goes into 21 0 times with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 824

Going ahead to step 3:
When dividing 213 by 824, we get 0 with a remainder of 213.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 213 after subtracting 0 from 213.
Bring next digit (9) of the dividend behind the 213 and repeat the process: 2139 / 824

On to step 4:
2139 divided by 824 is 2 with a remainder of 491.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 1648 from 2139 and we're left with 491.
Fetch the next digit (0) from the dividend, attach it to 491 and continue: 4910 / 824

Step 5:
The number 824 fits into 4910 5 times, leaving a remainder of 790.
The next digit of our result is 5. 
Result so far: 25.0
If we subtract 4120 from 4910, we get 790.
Append the next digit (4) from the dividend to 790 and continue with: 7904 / 824

Step 6:
824 can be fit into 7904 9 times, resulting in a remainder of 488.
The number 9 becomes the next digit in our result. 
Result so far: 259.0
Subtracting 7416 from 7904 leaves us with 488.
Grab the next digit (3) from the dividend, add it to 488, then carry on: 4883 / 824

Advancing to step 7:
If we divide 4883 by 824, we get 5 and a remainder of 763.
Use 5 as the next digit of our solution. 
Result so far: 2595.0
Subtracting 4120 from 4883 leaves us with 763.
Append the next digit (5) from the dividend to 763 and continue with: 7635 / 824

Going ahead to step 8:
7635 divided by 824 is 9 with a remainder of 219.
Write down 9 as next digit of the result. 
Result so far: 25959.0
If we take 7416 away from 7635, we end up with 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

On to step 9:
When dividing 2190 by 824, we get 2 with a remainder of 542.
Write down 2 as next digit of the result. 
Result so far: 25959.2
Subtracting 1648 from 2190 leaves us with 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

Advancing to step 10:
824 goes into 5420 6 times with a remainder of 476.
Record the quotient 6 as the next digit in the result. 
Result so far: 25959.26
If we take 4944 away from 5420, we end up with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Step 11:
When dividing 4760 by 824, we get 5 with a remainder of 640.
Use 5 as the next digit of our solution. 
Result so far: 25959.265
If we take 4120 away from 4760, we end up with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

On to step 12:
If we divide 6400 by 824, we get 7 and a remainder of 632.
Put 7 as the next digit of the answer. 
Result so far: 25959.2657
If we subtract 5768 from 6400, we get 632.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6320, and continue the process.

Going ahead to step 13:
6320 divided by 824 is 7 with a remainder of 552.
Put 7 as the next digit of the answer. 
Result so far: 25959.26577
Deduct 5768 from 6320 and we're left with 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

Our division results in 25959.26577 with a remaining 0.000552.