We look at the division of 40080351 by 869 
We're looking to find how many times 869 goes into 40080351.

Step 1:
The number 869 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
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 869

On to step 2:
The number 869 fits into 40 0 times, leaving a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 40, we end up with 40.
Append the next digit (0) from the dividend to 40 and continue with: 400 / 869

Moving on to step 3:
The number 869 fits into 400 0 times, leaving a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 400 to get 400.
Include the next digit (8) from the dividend after 400, then repeat: 4008 / 869

Advancing to step 4:
When dividing 4008 by 869, we get 4 with a remainder of 532.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 3476 from 4008 leaves us with 532.
Take the next digit (0) from the dividend and append it to 532, then repeat: 5320 / 869

Advancing to step 5:
If we divide 5320 by 869, we get 6 and a remainder of 106.
Record the quotient 6 as the next digit in the result. 
Result so far: 46.0
The remainder is 106 after subtracting 5214 from 5320.
Bring next digit (3) of the dividend behind the 106 and repeat the process: 1063 / 869

Let's proceed to step 6:
1063 divided by 869 is 1 with a remainder of 194.
Record the quotient 1 as the next digit in the result. 
Result so far: 461.0
If we subtract 869 from 1063, we get 194.
Fetch the next digit (5) from the dividend, attach it to 194 and continue: 1945 / 869

Advancing to step 7:
1945 divided by 869 is 2 with a remainder of 207.
Record the quotient 2 as the next digit in the result. 
Result so far: 4612.0
If we subtract 1738 from 1945, we get 207.
Bring next digit (1) of the dividend behind the 207 and repeat the process: 2071 / 869

Step 8:
869 can be fit into 2071 2 times, resulting in a remainder of 333.
Put 2 as the next digit of the answer. 
Result so far: 46122.0
Subtract 1738 from 2071 to get 333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

Going ahead to step 9:
The number 869 fits into 3330 3 times, leaving a remainder of 723.
Put 3 as the next digit of the answer. 
Result so far: 46122.3
If we subtract 2607 from 3330, we get 723.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7230, and continue the process.

Step 10:
When dividing 7230 by 869, we get 8 with a remainder of 278.
The number 8 becomes the next digit in our result. 
Result so far: 46122.38
Subtract 6952 from 7230 to get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Moving on to step 11:
When dividing 2780 by 869, we get 3 with a remainder of 173.
The next digit of our result is 3. 
Result so far: 46122.383
The remainder is 173 after subtracting 2607 from 2780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

On to step 12:
869 can be fit into 1730 1 times, resulting in a remainder of 861.
The next digit of our result is 1. 
Result so far: 46122.3831
Subtracting 869 from 1730 leaves us with 861.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8610, and continue the process.

Advancing to step 13:
869 can be fit into 8610 9 times, resulting in a remainder of 789.
The next digit of our result is 9. 
Result so far: 46122.38319
Deduct 7821 from 8610 and we're left with 789.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7890, and continue the process.

Advancing to step 14:
869 goes into 7890 9 times with a remainder of 69.
Write down 9 as next digit of the result. 
Result so far: 46122.383199
Subtracting 7821 from 7890 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

The quotient of the division is 46122.383199, and the remainder is 6.9e-06.