We're dividing 52003 by 40 
Our goal is to divide 52003 by 40.

Let's proceed to step 1:
40 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 40

On to step 2:
The number 40 fits into 52 1 times, leaving a remainder of 12.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 40 from 52 to get 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 40

On to step 3:
When dividing 120 by 40, we get 3 with a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 120 from 120, we get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 40

Advancing to step 4:
When dividing 0 by 40, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 130.0
Subtracting 0 from 0 leaves us with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 40

Step 5:
When dividing 3 by 40, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 1300.0
If we take 0 away from 3, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 6:
40 goes into 30 0 times with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 1300.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 7:
When dividing 300 by 40, we get 7 with a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 1300.07
Deduct 280 from 300 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
When dividing 200 by 40, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 1300.075
Subtracting 200 from 200 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
The number 40 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1300.075
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
If we divide 0 by 40, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1300.075
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 1300.075, with a leftover of 0.0.