We're dividing 42435587 by 439 
We want to figure out the number of times 42435587 can be divided by 439.

Going ahead to step 1:
If we divide 4 by 439, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 439

Step 2:
439 can be fit into 42 0 times, resulting in a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Grab the next digit (4) from the dividend, add it to 42, then carry on: 424 / 439

Moving on to step 3:
If we divide 424 by 439, we get 0 and a remainder of 424.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 424, we end up with 424.
Grab the next digit (3) from the dividend, add it to 424, then carry on: 4243 / 439

Moving on to step 4:
When dividing 4243 by 439, we get 9 with a remainder of 292.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtract 3951 from 4243 to get 292.
Include the next digit (5) from the dividend after 292, then repeat: 2925 / 439

Step 5:
If we divide 2925 by 439, we get 6 and a remainder of 291.
The number 6 becomes the next digit in our result. 
Result so far: 96.0
The remainder is 291 after subtracting 2634 from 2925.
Fetch the next digit (5) from the dividend, attach it to 291 and continue: 2915 / 439

Moving on to step 6:
The number 439 fits into 2915 6 times, leaving a remainder of 281.
The number 6 becomes the next digit in our result. 
Result so far: 966.0
Subtracting 2634 from 2915 leaves us with 281.
Include the next digit (8) from the dividend after 281, then repeat: 2818 / 439

Going ahead to step 7:
The number 439 fits into 2818 6 times, leaving a remainder of 184.
The next digit of our result is 6. 
Result so far: 9666.0
If we take 2634 away from 2818, we end up with 184.
Fetch the next digit (7) from the dividend, attach it to 184 and continue: 1847 / 439

Advancing to step 8:
The number 439 fits into 1847 4 times, leaving a remainder of 91.
The number 4 becomes the next digit in our result. 
Result so far: 96664.0
Subtracting 1756 from 1847 leaves us with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Going ahead to step 9:
The number 439 fits into 910 2 times, leaving a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 96664.2
Subtract 878 from 910 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 10:
320 divided by 439 is 0 with a remainder of 320.
The next digit of our result is 0. 
Result so far: 96664.2
If we subtract 0 from 320, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 11:
The number 439 fits into 3200 7 times, leaving a remainder of 127.
Record the quotient 7 as the next digit in the result. 
Result so far: 96664.207
Deduct 3073 from 3200 and we're left with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Let's proceed to step 12:
The number 439 fits into 1270 2 times, leaving a remainder of 392.
Write down 2 as next digit of the result. 
Result so far: 96664.2072
Subtract 878 from 1270 to get 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Let's proceed to step 13:
When dividing 3920 by 439, we get 8 with a remainder of 408.
The next digit of our result is 8. 
Result so far: 96664.20728
If we subtract 3512 from 3920, we get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

On to step 14:
When dividing 4080 by 439, we get 9 with a remainder of 129.
Use 9 as the next digit of our solution. 
Result so far: 96664.207289
Subtracting 3951 from 4080 leaves us with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Step 15:
1290 divided by 439 is 2 with a remainder of 412.
The number 2 becomes the next digit in our result. 
Result so far: 96664.2072892
If we subtract 878 from 1290, we get 412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

Step 16:
When dividing 4120 by 439, we get 9 with a remainder of 169.
The next digit of our result is 9. 
Result so far: 96664.20728929
If we subtract 3951 from 4120, we get 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

After the division, we end up with 96664.20728929 and a remainder of 1.69e-07.