We're dividing 12543635 by 903 
We want to figure out the number of times 12543635 can be divided by 903.

Let's proceed to step 1:
The number 903 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 903

Moving on to step 2:
12 divided by 903 is 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 903

Going ahead to step 3:
903 goes into 125 0 times with a remainder of 125.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 125, we get 125.
Take the next digit (4) from the dividend and append it to 125, then repeat: 1254 / 903

Advancing to step 4:
When dividing 1254 by 903, we get 1 with a remainder of 351.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 903 from 1254 leaves us with 351.
Fetch the next digit (3) from the dividend, attach it to 351 and continue: 3513 / 903

Advancing to step 5:
903 can be fit into 3513 3 times, resulting in a remainder of 804.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 2709 from 3513, we get 804.
Grab the next digit (6) from the dividend, add it to 804, then carry on: 8046 / 903

Advancing to step 6:
8046 divided by 903 is 8 with a remainder of 822.
Write down 8 as next digit of the result. 
Result so far: 138.0
Subtracting 7224 from 8046 leaves us with 822.
Bring next digit (3) of the dividend behind the 822 and repeat the process: 8223 / 903

Let's proceed to step 7:
If we divide 8223 by 903, we get 9 and a remainder of 96.
The next digit of our result is 9. 
Result so far: 1389.0
If we take 8127 away from 8223, we end up with 96.
Include the next digit (5) from the dividend after 96, then repeat: 965 / 903

Going ahead to step 8:
The number 903 fits into 965 1 times, leaving a remainder of 62.
The next digit of our result is 1. 
Result so far: 13891.0
If we take 903 away from 965, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 9:
When dividing 620 by 903, we get 0 with a remainder of 620.
Record the quotient 0 as the next digit in the result. 
Result so far: 13891.0
If we subtract 0 from 620, we get 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Going ahead to step 10:
The number 903 fits into 6200 6 times, leaving a remainder of 782.
The number 6 becomes the next digit in our result. 
Result so far: 13891.06
If we take 5418 away from 6200, we end up with 782.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7820, and continue the process.

Going ahead to step 11:
903 can be fit into 7820 8 times, resulting in a remainder of 596.
Use 8 as the next digit of our solution. 
Result so far: 13891.068
Deduct 7224 from 7820 and we're left with 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Advancing to step 12:
903 goes into 5960 6 times with a remainder of 542.
Record the quotient 6 as the next digit in the result. 
Result so far: 13891.0686
The remainder is 542 after subtracting 5418 from 5960.
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 13:
903 goes into 5420 6 times with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 13891.06866
The remainder is 2 after subtracting 5418 from 5420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

After the division, we end up with 13891.06866 and a remainder of 2e-06.