126503 ÷ 18 
We want to divide 126503 by 18.

On to step 1:
18 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
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 / 18

Advancing to step 2:
The number 18 fits into 12 0 times, leaving a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Include the next digit (6) from the dividend after 12, then repeat: 126 / 18

Let's proceed to step 3:
18 can be fit into 126 7 times, resulting in a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 126 from 126 to get 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 18

On to step 4:
18 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 70.0
Subtract 0 from 5 to get 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 18

Advancing to step 5:
18 can be fit into 50 2 times, resulting in a remainder of 14.
The next digit of our result is 2. 
Result so far: 702.0
Subtracting 36 from 50 leaves us with 14.
Include the next digit (3) from the dividend after 14, then repeat: 143 / 18

Going ahead to step 6:
143 divided by 18 is 7 with a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 7027.0
Deduct 126 from 143 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
If we divide 170 by 18, we get 9 and a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 7027.9
Subtracting 162 from 170 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 8:
80 divided by 18 is 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 7027.94
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
18 can be fit into 80 4 times, resulting in a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 7027.944
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 7027.944 with a remaining 0.0008.