10126540 ÷ 999 
Our goal is to divide 10126540 by 999.

Step 1:
1 divided by 999 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 999

Going ahead to step 2:
999 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 10 and we're left with 10.
Fetch the next digit (1) from the dividend, attach it to 10 and continue: 101 / 999

Moving on to step 3:
101 divided by 999 is 0 with a remainder of 101.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 101, we get 101.
Fetch the next digit (2) from the dividend, attach it to 101 and continue: 1012 / 999

Let's proceed to step 4:
999 can be fit into 1012 1 times, resulting in a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 999 from 1012 to get 13.
Bring next digit (6) of the dividend behind the 13 and repeat the process: 136 / 999

Step 5:
136 divided by 999 is 0 with a remainder of 136.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtracting 0 from 136 leaves us with 136.
Fetch the next digit (5) from the dividend, attach it to 136 and continue: 1365 / 999

Step 6:
If we divide 1365 by 999, we get 1 and a remainder of 366.
Use 1 as the next digit of our solution. 
Result so far: 101.0
The remainder is 366 after subtracting 999 from 1365.
Take the next digit (4) from the dividend and append it to 366, then repeat: 3664 / 999

Going ahead to step 7:
The number 999 fits into 3664 3 times, leaving a remainder of 667.
Write down 3 as next digit of the result. 
Result so far: 1013.0
The remainder is 667 after subtracting 2997 from 3664.
Bring next digit (0) of the dividend behind the 667 and repeat the process: 6670 / 999

Going ahead to step 8:
999 goes into 6670 6 times with a remainder of 676.
Record the quotient 6 as the next digit in the result. 
Result so far: 10136.0
Subtracting 5994 from 6670 leaves us with 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

On to step 9:
999 goes into 6760 6 times with a remainder of 766.
The number 6 becomes the next digit in our result. 
Result so far: 10136.6
Subtract 5994 from 6760 to get 766.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7660, and continue the process.

Going ahead to step 10:
The number 999 fits into 7660 7 times, leaving a remainder of 667.
Record the quotient 7 as the next digit in the result. 
Result so far: 10136.67
If we take 6993 away from 7660, we end up with 667.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6670, and continue the process.

Moving on to step 11:
When dividing 6670 by 999, we get 6 with a remainder of 676.
The next digit of our result is 6. 
Result so far: 10136.676
Subtract 5994 from 6670 to get 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

Going ahead to step 12:
999 can be fit into 6760 6 times, resulting in a remainder of 766.
Record the quotient 6 as the next digit in the result. 
Result so far: 10136.6766
If we take 5994 away from 6760, we end up with 766.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7660, and continue the process.

The final outcome is 10136.6766, with a leftover of 0.00766.