12536807 ÷ 403 
We want to divide 12536807 by 403.

On to step 1:
When dividing 1 by 403, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 403

Going ahead to step 2:
403 can be fit into 12 0 times, resulting in 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.
Take the next digit (5) from the dividend and append it to 12, then repeat: 125 / 403

Moving on to step 3:
If we divide 125 by 403, we get 0 and a remainder of 125.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 125 and we're left with 125.
Fetch the next digit (3) from the dividend, attach it to 125 and continue: 1253 / 403

Let's proceed to step 4:
403 can be fit into 1253 3 times, resulting in a remainder of 44.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 1209 from 1253 to get 44.
Bring next digit (6) of the dividend behind the 44 and repeat the process: 446 / 403

On to step 5:
403 can be fit into 446 1 times, resulting in a remainder of 43.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
Deduct 403 from 446 and we're left with 43.
Grab the next digit (8) from the dividend, add it to 43, then carry on: 438 / 403

Advancing to step 6:
438 divided by 403 is 1 with a remainder of 35.
Use 1 as the next digit of our solution. 
Result so far: 311.0
Subtract 403 from 438 to get 35.
Take the next digit (0) from the dividend and append it to 35, then repeat: 350 / 403

Going ahead to step 7:
350 divided by 403 is 0 with a remainder of 350.
Use 0 as the next digit of our solution. 
Result so far: 3110.0
If we subtract 0 from 350, we get 350.
Append the next digit (7) from the dividend to 350 and continue with: 3507 / 403

Step 8:
403 can be fit into 3507 8 times, resulting in a remainder of 283.
Write down 8 as next digit of the result. 
Result so far: 31108.0
Deduct 3224 from 3507 and we're left 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.

Going ahead to step 9:
2830 divided by 403 is 7 with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 31108.7
If we subtract 2821 from 2830, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 10:
403 goes into 90 0 times with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 31108.7
If we subtract 0 from 90, we get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 11:
If we divide 900 by 403, we get 2 and a remainder of 94.
Write down 2 as next digit of the result. 
Result so far: 31108.702
Subtracting 806 from 900 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

On to step 12:
403 can be fit into 940 2 times, resulting in a remainder of 134.
Put 2 as the next digit of the answer. 
Result so far: 31108.7022
If we take 806 away from 940, we end up with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Our division results in 31108.7022 with a remaining 0.00134.