We divide 40063943 by 800
We want to figure out the number of times 40063943 can be divided by 800.

Going ahead to step 1:
The number 800 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 800

On to step 2:
800 can be fit into 40 0 times, resulting in a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 40 after subtracting 0 from 40.
Take the next digit (0) from the dividend and append it to 40, then repeat: 400 / 800

Moving on to step 3:
The number 800 fits into 400 0 times, leaving a remainder of 400.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 400, we get 400.
Fetch the next digit (6) from the dividend, attach it to 400 and continue: 4006 / 800

On to step 4:
The number 800 fits into 4006 5 times, leaving a remainder of 6.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 4000 away from 4006, we end up with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 800

Going ahead to step 5:
800 can be fit into 63 0 times, resulting in a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 50.0
If we subtract 0 from 63, we get 63.
Include the next digit (9) from the dividend after 63, then repeat: 639 / 800

On to step 6:
800 can be fit into 639 0 times, resulting in a remainder of 639.
The number 0 becomes the next digit in our result. 
Result so far: 500.0
Subtract 0 from 639 to get 639.
Take the next digit (4) from the dividend and append it to 639, then repeat: 6394 / 800

On to step 7:
The number 800 fits into 6394 7 times, leaving a remainder of 794.
The number 7 becomes the next digit in our result. 
Result so far: 5007.0
Subtract 5600 from 6394 to get 794.
Append the next digit (3) from the dividend to 794 and continue with: 7943 / 800

Going ahead to step 8:
If we divide 7943 by 800, we get 9 and a remainder of 743.
The number 9 becomes the next digit in our result. 
Result so far: 50079.0
Deduct 7200 from 7943 and we're left with 743.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7430, and continue the process.

Advancing to step 9:
If we divide 7430 by 800, we get 9 and a remainder of 230.
Use 9 as the next digit of our solution. 
Result so far: 50079.9
Subtract 7200 from 7430 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

On to step 10:
800 can be fit into 2300 2 times, resulting in a remainder of 700.
Put 2 as the next digit of the answer. 
Result so far: 50079.92
The remainder is 700 after subtracting 1600 from 2300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

On to step 11:
7000 divided by 800 is 8 with a remainder of 600.
Put 8 as the next digit of the answer. 
Result so far: 50079.928
The remainder is 600 after subtracting 6400 from 7000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Let's proceed to step 12:
800 can be fit into 6000 7 times, resulting in a remainder of 400.
The number 7 becomes the next digit in our result. 
Result so far: 50079.9287
If we subtract 5600 from 6000, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Advancing to step 13:
When dividing 4000 by 800, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 50079.92875
Subtracting 4000 from 4000 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.

Going ahead to step 14:
800 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 50079.92875
Deduct 0 from 0 and we're left 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.

Step 15:
If we divide 0 by 800, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 50079.92875
If we subtract 0 from 0, we get 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 result is 50079.92875 with a remainder of 0.0.