We look at the division of 439290 by 86 
We want to divide 439290 by 86.

Advancing to step 1:
86 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 86

Advancing to step 2:
The number 86 fits into 43 0 times, leaving a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Include the next digit (9) from the dividend after 43, then repeat: 439 / 86

Step 3:
86 can be fit into 439 5 times, resulting in a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we take 430 away from 439, we end up with 9.
Fetch the next digit (2) from the dividend, attach it to 9 and continue: 92 / 86

Let's proceed to step 4:
The number 86 fits into 92 1 times, leaving a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
Deduct 86 from 92 and we're left with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 86

On to step 5:
69 divided by 86 is 0 with a remainder of 69.
Put 0 as the next digit of the answer. 
Result so far: 510.0
If we subtract 0 from 69, we get 69.
Take the next digit (0) from the dividend and append it to 69, then repeat: 690 / 86

Moving on to step 6:
690 divided by 86 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 5108.0
Deduct 688 from 690 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
20 divided by 86 is 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 5108.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
200 divided by 86 is 2 with a remainder of 28.
The next digit of our result is 2. 
Result so far: 5108.02
The remainder is 28 after subtracting 172 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 9:
When dividing 280 by 86, we get 3 with a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 5108.023
Subtracting 258 from 280 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 10:
The number 86 fits into 220 2 times, leaving a remainder of 48.
The next digit of our result is 2. 
Result so far: 5108.0232
Subtracting 172 from 220 leaves us with 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 11:
The number 86 fits into 480 5 times, leaving a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 5108.02325
The remainder is 50 after subtracting 430 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 12:
If we divide 500 by 86, we get 5 and a remainder of 70.
Use 5 as the next digit of our solution. 
Result so far: 5108.023255
If we subtract 430 from 500, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

In conclusion, the division gives 5108.023255 with a balance of 7e-06.