10214399 ÷ 819 
Our goal is to divide 10214399 by 819.

Step 1:
The number 819 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 819

Moving on to step 2:
When dividing 10 by 819, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 10 and we're left with 10.
Append the next digit (2) from the dividend to 10 and continue with: 102 / 819

Advancing to step 3:
819 goes into 102 0 times with a remainder of 102.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 102 leaves us with 102.
Bring next digit (1) of the dividend behind the 102 and repeat the process: 1021 / 819

Going ahead to step 4:
819 goes into 1021 1 times with a remainder of 202.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 819 from 1021 and we're left with 202.
Include the next digit (4) from the dividend after 202, then repeat: 2024 / 819

Going ahead to step 5:
If we divide 2024 by 819, we get 2 and a remainder of 386.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 1638 away from 2024, we end up with 386.
Include the next digit (3) from the dividend after 386, then repeat: 3863 / 819

Step 6:
The number 819 fits into 3863 4 times, leaving a remainder of 587.
Write down 4 as next digit of the result. 
Result so far: 124.0
The remainder is 587 after subtracting 3276 from 3863.
Bring next digit (9) of the dividend behind the 587 and repeat the process: 5879 / 819

Let's proceed to step 7:
The number 819 fits into 5879 7 times, leaving a remainder of 146.
Put 7 as the next digit of the answer. 
Result so far: 1247.0
If we take 5733 away from 5879, we end up with 146.
Append the next digit (9) from the dividend to 146 and continue with: 1469 / 819

On to step 8:
1469 divided by 819 is 1 with a remainder of 650.
The number 1 becomes the next digit in our result. 
Result so far: 12471.0
The remainder is 650 after subtracting 819 from 1469.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

Let's proceed to step 9:
When dividing 6500 by 819, we get 7 with a remainder of 767.
Write down 7 as next digit of the result. 
Result so far: 12471.7
Subtract 5733 from 6500 to get 767.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7670, and continue the process.

Advancing to step 10:
If we divide 7670 by 819, we get 9 and a remainder of 299.
Write down 9 as next digit of the result. 
Result so far: 12471.79
Deduct 7371 from 7670 and we're left with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Step 11:
If we divide 2990 by 819, we get 3 and a remainder of 533.
Use 3 as the next digit of our solution. 
Result so far: 12471.793
Subtracting 2457 from 2990 leaves us with 533.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5330, and continue the process.

Moving on to step 12:
5330 divided by 819 is 6 with a remainder of 416.
Record the quotient 6 as the next digit in the result. 
Result so far: 12471.7936
Deduct 4914 from 5330 and we're left with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Advancing to step 13:
819 goes into 4160 5 times with a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 12471.79365
The remainder is 65 after subtracting 4095 from 4160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 14:
The number 819 fits into 650 0 times, leaving a remainder of 650.
Record the quotient 0 as the next digit in the result. 
Result so far: 12471.79365
Subtract 0 from 650 to get 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

Going ahead to step 15:
819 can be fit into 6500 7 times, resulting in a remainder of 767.
Put 7 as the next digit of the answer. 
Result so far: 12471.7936507
Subtracting 5733 from 6500 leaves us with 767.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7670, and continue the process.

Advancing to step 16:
When dividing 7670 by 819, we get 9 with a remainder of 299.
The number 9 becomes the next digit in our result. 
Result so far: 12471.79365079
Deduct 7371 from 7670 and we're left with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

In conclusion, the division gives 12471.79365079 with a balance of 2.99e-07.