We're dividing 34405090 by 869 
We want to figure out the number of times 34405090 can be divided by 869.

On to step 1:
869 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 869

Advancing to step 2:
869 goes into 34 0 times with a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 34 and we're left with 34.
Append the next digit (4) from the dividend to 34 and continue with: 344 / 869

Moving on to step 3:
344 divided by 869 is 0 with a remainder of 344.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 344, we get 344.
Take the next digit (0) from the dividend and append it to 344, then repeat: 3440 / 869

Let's proceed to step 4:
869 goes into 3440 3 times with a remainder of 833.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 2607 from 3440, we get 833.
Include the next digit (5) from the dividend after 833, then repeat: 8335 / 869

Advancing to step 5:
869 goes into 8335 9 times with a remainder of 514.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
Subtract 7821 from 8335 to get 514.
Grab the next digit (0) from the dividend, add it to 514, then carry on: 5140 / 869

Step 6:
If we divide 5140 by 869, we get 5 and a remainder of 795.
Record the quotient 5 as the next digit in the result. 
Result so far: 395.0
If we take 4345 away from 5140, we end up with 795.
Take the next digit (9) from the dividend and append it to 795, then repeat: 7959 / 869

Let's proceed to step 7:
When dividing 7959 by 869, we get 9 with a remainder of 138.
Use 9 as the next digit of our solution. 
Result so far: 3959.0
Subtracting 7821 from 7959 leaves us with 138.
Include the next digit (0) from the dividend after 138, then repeat: 1380 / 869

Advancing to step 8:
869 can be fit into 1380 1 times, resulting in a remainder of 511.
The number 1 becomes the next digit in our result. 
Result so far: 39591.0
Subtract 869 from 1380 to get 511.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5110, and continue the process.

Step 9:
5110 divided by 869 is 5 with a remainder of 765.
The number 5 becomes the next digit in our result. 
Result so far: 39591.5
Deduct 4345 from 5110 and we're left with 765.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7650, and continue the process.

Let's proceed to step 10:
7650 divided by 869 is 8 with a remainder of 698.
Write down 8 as next digit of the result. 
Result so far: 39591.58
If we take 6952 away from 7650, we end up with 698.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6980, and continue the process.

Let's proceed to step 11:
869 can be fit into 6980 8 times, resulting in a remainder of 28.
Record the quotient 8 as the next digit in the result. 
Result so far: 39591.588
Subtracting 6952 from 6980 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final result is 39591.588 with a remainder of 0.0028.