10623523 ÷ 399 
Our goal is to divide 10623523 by 399.

Let's proceed to step 1:
1 divided by 399 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 399

Advancing to step 2:
The number 399 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 10, we end up with 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 399

On to step 3:
If we divide 106 by 399, we get 0 and a remainder of 106.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 106 and we're left with 106.
Take the next digit (2) from the dividend and append it to 106, then repeat: 1062 / 399

Moving on to step 4:
399 can be fit into 1062 2 times, resulting in a remainder of 264.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 798 away from 1062, we end up with 264.
Grab the next digit (3) from the dividend, add it to 264, then carry on: 2643 / 399

Moving on to step 5:
2643 divided by 399 is 6 with a remainder of 249.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
If we take 2394 away from 2643, we end up with 249.
Grab the next digit (5) from the dividend, add it to 249, then carry on: 2495 / 399

Let's proceed to step 6:
399 goes into 2495 6 times with a remainder of 101.
Write down 6 as next digit of the result. 
Result so far: 266.0
Subtract 2394 from 2495 to get 101.
Take the next digit (2) from the dividend and append it to 101, then repeat: 1012 / 399

Advancing to step 7:
399 can be fit into 1012 2 times, resulting in a remainder of 214.
The next digit of our result is 2. 
Result so far: 2662.0
Deduct 798 from 1012 and we're left with 214.
Grab the next digit (3) from the dividend, add it to 214, then carry on: 2143 / 399

Step 8:
2143 divided by 399 is 5 with a remainder of 148.
Write down 5 as next digit of the result. 
Result so far: 26625.0
Subtracting 1995 from 2143 leaves us with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Let's proceed to step 9:
399 can be fit into 1480 3 times, resulting in a remainder of 283.
Use 3 as the next digit of our solution. 
Result so far: 26625.3
If we take 1197 away from 1480, we end up with 283.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

Let's proceed to step 10:
399 can be fit into 2830 7 times, resulting in a remainder of 37.
The next digit of our result is 7. 
Result so far: 26625.37
Subtracting 2793 from 2830 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 11:
The number 399 fits into 370 0 times, leaving a remainder of 370.
Put 0 as the next digit of the answer. 
Result so far: 26625.37
Subtract 0 from 370 to get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Advancing to step 12:
399 can be fit into 3700 9 times, resulting in a remainder of 109.
Write down 9 as next digit of the result. 
Result so far: 26625.3709
The remainder is 109 after subtracting 3591 from 3700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

On to step 13:
The number 399 fits into 1090 2 times, leaving a remainder of 292.
The next digit of our result is 2. 
Result so far: 26625.37092
Subtract 798 from 1090 to get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

On to step 14:
2920 divided by 399 is 7 with a remainder of 127.
The number 7 becomes the next digit in our result. 
Result so far: 26625.370927
The remainder is 127 after subtracting 2793 from 2920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

On to step 15:
When dividing 1270 by 399, we get 3 with a remainder of 73.
Record the quotient 3 as the next digit in the result. 
Result so far: 26625.3709273
Deduct 1197 from 1270 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 16:
399 goes into 730 1 times with a remainder of 331.
Use 1 as the next digit of our solution. 
Result so far: 26625.37092731
If we subtract 399 from 730, we get 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Our division results in 26625.37092731 with a remaining 3.31e-07.