42354087 ÷ 809 
We're looking to find how many times 809 goes into 42354087.

Advancing to step 1:
809 goes into 4 0 times with 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.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 809

Let's proceed to step 2:
42 divided by 809 is 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Append the next digit (3) from the dividend to 42 and continue with: 423 / 809

Advancing to step 3:
When dividing 423 by 809, we get 0 with a remainder of 423.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 423 and we're left with 423.
Grab the next digit (5) from the dividend, add it to 423, then carry on: 4235 / 809

Step 4:
When dividing 4235 by 809, we get 5 with a remainder of 190.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 4045 away from 4235, we end up with 190.
Append the next digit (4) from the dividend to 190 and continue with: 1904 / 809

Let's proceed to step 5:
809 goes into 1904 2 times with a remainder of 286.
Put 2 as the next digit of the answer. 
Result so far: 52.0
If we subtract 1618 from 1904, we get 286.
Bring next digit (0) of the dividend behind the 286 and repeat the process: 2860 / 809

Advancing to step 6:
When dividing 2860 by 809, we get 3 with a remainder of 433.
Use 3 as the next digit of our solution. 
Result so far: 523.0
If we subtract 2427 from 2860, we get 433.
Include the next digit (8) from the dividend after 433, then repeat: 4338 / 809

Moving on to step 7:
The number 809 fits into 4338 5 times, leaving a remainder of 293.
The next digit of our result is 5. 
Result so far: 5235.0
If we take 4045 away from 4338, we end up with 293.
Bring next digit (7) of the dividend behind the 293 and repeat the process: 2937 / 809

On to step 8:
809 can be fit into 2937 3 times, resulting in a remainder of 510.
Record the quotient 3 as the next digit in the result. 
Result so far: 52353.0
Deduct 2427 from 2937 and we're left with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Advancing to step 9:
The number 809 fits into 5100 6 times, leaving a remainder of 246.
Use 6 as the next digit of our solution. 
Result so far: 52353.6
The remainder is 246 after subtracting 4854 from 5100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Let's proceed to step 10:
809 can be fit into 2460 3 times, resulting in a remainder of 33.
Put 3 as the next digit of the answer. 
Result so far: 52353.63
The remainder is 33 after subtracting 2427 from 2460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 11:
330 divided by 809 is 0 with a remainder of 330.
Use 0 as the next digit of our solution. 
Result so far: 52353.63
If we take 0 away from 330, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

On to step 12:
809 goes into 3300 4 times with a remainder of 64.
Write down 4 as next digit of the result. 
Result so far: 52353.6304
Deduct 3236 from 3300 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 13:
809 can be fit into 640 0 times, resulting in a remainder of 640.
Write down 0 as next digit of the result. 
Result so far: 52353.6304
If we subtract 0 from 640, we get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Step 14:
809 can be fit into 6400 7 times, resulting in a remainder of 737.
The number 7 becomes the next digit in our result. 
Result so far: 52353.630407
Subtract 5663 from 6400 to get 737.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7370, and continue the process.

Going ahead to step 15:
809 goes into 7370 9 times with a remainder of 89.
The next digit of our result is 9. 
Result so far: 52353.6304079
Subtract 7281 from 7370 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Advancing to step 16:
The number 809 fits into 890 1 times, leaving a remainder of 81.
The number 1 becomes the next digit in our result. 
Result so far: 52353.63040791
Subtracting 809 from 890 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

In conclusion, the division gives 52353.63040791 with a balance of 8.1e-08.