We look at the division of 99511259 by 503 
Our goal is to divide 99511259 by 503.

Let's proceed to step 1:
If we divide 9 by 503, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 503

Let's proceed to step 2:
503 goes into 99 0 times with a remainder of 99.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Bring next digit (5) of the dividend behind the 99 and repeat the process: 995 / 503

Let's proceed to step 3:
503 can be fit into 995 1 times, resulting in a remainder of 492.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 503 away from 995, we end up with 492.
Include the next digit (1) from the dividend after 492, then repeat: 4921 / 503

Moving on to step 4:
The number 503 fits into 4921 9 times, leaving a remainder of 394.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we subtract 4527 from 4921, we get 394.
Append the next digit (1) from the dividend to 394 and continue with: 3941 / 503

Let's proceed to step 5:
503 can be fit into 3941 7 times, resulting in a remainder of 420.
The number 7 becomes the next digit in our result. 
Result so far: 197.0
The remainder is 420 after subtracting 3521 from 3941.
Include the next digit (2) from the dividend after 420, then repeat: 4202 / 503

Step 6:
The number 503 fits into 4202 8 times, leaving a remainder of 178.
Use 8 as the next digit of our solution. 
Result so far: 1978.0
If we subtract 4024 from 4202, we get 178.
Bring next digit (5) of the dividend behind the 178 and repeat the process: 1785 / 503

Step 7:
503 goes into 1785 3 times with a remainder of 276.
Put 3 as the next digit of the answer. 
Result so far: 19783.0
Deduct 1509 from 1785 and we're left with 276.
Take the next digit (9) from the dividend and append it to 276, then repeat: 2769 / 503

Moving on to step 8:
503 goes into 2769 5 times with a remainder of 254.
Write down 5 as next digit of the result. 
Result so far: 197835.0
If we subtract 2515 from 2769, we get 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Moving on to step 9:
If we divide 2540 by 503, we get 5 and a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 197835.5
If we subtract 2515 from 2540, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 10:
If we divide 250 by 503, we get 0 and a remainder of 250.
Use 0 as the next digit of our solution. 
Result so far: 197835.5
Subtracting 0 from 250 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 11:
503 can be fit into 2500 4 times, resulting in a remainder of 488.
Put 4 as the next digit of the answer. 
Result so far: 197835.504
Subtracting 2012 from 2500 leaves us with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Step 12:
4880 divided by 503 is 9 with a remainder of 353.
The number 9 becomes the next digit in our result. 
Result so far: 197835.5049
If we take 4527 away from 4880, we end up with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Step 13:
When dividing 3530 by 503, we get 7 with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 197835.50497
If we take 3521 away from 3530, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 14:
503 goes into 90 0 times with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 197835.50497
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.

Moving on to step 15:
The number 503 fits into 900 1 times, leaving a remainder of 397.
Write down 1 as next digit of the result. 
Result so far: 197835.5049701
Deduct 503 from 900 and we're left with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

On to step 16:
When dividing 3970 by 503, we get 7 with a remainder of 449.
Record the quotient 7 as the next digit in the result. 
Result so far: 197835.50497017
Subtracting 3521 from 3970 leaves us with 449.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4490, and continue the process.

The final outcome is 197835.50497017, with a leftover of 4.49e-07.