We look at the division of 435139 by 86 
We want to divide 435139 by 86.

Advancing to step 1:
If we divide 4 by 86, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 86

Moving on to step 2:
86 goes into 43 0 times with a remainder of 43.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 43 and we're left with 43.
Take the next digit (5) from the dividend and append it to 43, then repeat: 435 / 86

Advancing to step 3:
86 can be fit into 435 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 5.0
The remainder is 5 after subtracting 430 from 435.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 86

On to step 4:
86 goes into 51 0 times with a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 50.0
Deduct 0 from 51 and we're left with 51.
Grab the next digit (3) from the dividend, add it to 51, then carry on: 513 / 86

Going ahead to step 5:
86 can be fit into 513 5 times, resulting in a remainder of 83.
The next digit of our result is 5. 
Result so far: 505.0
If we subtract 430 from 513, we get 83.
Take the next digit (9) from the dividend and append it to 83, then repeat: 839 / 86

Let's proceed to step 6:
If we divide 839 by 86, we get 9 and a remainder of 65.
Put 9 as the next digit of the answer. 
Result so far: 5059.0
Subtract 774 from 839 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 7:
650 divided by 86 is 7 with a remainder of 48.
Put 7 as the next digit of the answer. 
Result so far: 5059.7
Subtract 602 from 650 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 8:
When dividing 480 by 86, we get 5 with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 5059.75
Subtracting 430 from 480 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 9:
If we divide 500 by 86, we get 5 and a remainder of 70.
The number 5 becomes the next digit in our result. 
Result so far: 5059.755
If we take 430 away from 500, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final result is 5059.755 with a remainder of 0.007.