Let's divide 42631040 by 503
We want to divide 42631040 by 503.

On to step 1:
503 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 503

On to step 2:
The number 503 fits into 42 0 times, leaving a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Append the next digit (6) from the dividend to 42 and continue with: 426 / 503

Step 3:
When dividing 426 by 503, we get 0 with a remainder of 426.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 426 leaves us with 426.
Append the next digit (3) from the dividend to 426 and continue with: 4263 / 503

Step 4:
The number 503 fits into 4263 8 times, leaving a remainder of 239.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 4024 away from 4263, we end up with 239.
Include the next digit (1) from the dividend after 239, then repeat: 2391 / 503

Going ahead to step 5:
The number 503 fits into 2391 4 times, leaving a remainder of 379.
Write down 4 as next digit of the result. 
Result so far: 84.0
Subtract 2012 from 2391 to get 379.
Bring next digit (0) of the dividend behind the 379 and repeat the process: 3790 / 503

Going ahead to step 6:
503 can be fit into 3790 7 times, resulting in a remainder of 269.
The next digit of our result is 7. 
Result so far: 847.0
Deduct 3521 from 3790 and we're left with 269.
Take the next digit (4) from the dividend and append it to 269, then repeat: 2694 / 503

On to step 7:
When dividing 2694 by 503, we get 5 with a remainder of 179.
Put 5 as the next digit of the answer. 
Result so far: 8475.0
Subtracting 2515 from 2694 leaves us with 179.
Append the next digit (0) from the dividend to 179 and continue with: 1790 / 503

Step 8:
1790 divided by 503 is 3 with a remainder of 281.
Use 3 as the next digit of our solution. 
Result so far: 84753.0
If we subtract 1509 from 1790, we get 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Going ahead to step 9:
If we divide 2810 by 503, we get 5 and a remainder of 295.
The next digit of our result is 5. 
Result so far: 84753.5
Subtract 2515 from 2810 to get 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Advancing to step 10:
503 goes into 2950 5 times with a remainder of 435.
Use 5 as the next digit of our solution. 
Result so far: 84753.55
Deduct 2515 from 2950 and we're left with 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

The final outcome is 84753.55, with a leftover of 0.435.