We're dividing 258339 by 85 
Our goal is to divide 258339 by 85.

On to step 1:
85 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 85

Going ahead to step 2:
25 divided by 85 is 0 with a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Grab the next digit (8) from the dividend, add it to 25, then carry on: 258 / 85

Advancing to step 3:
If we divide 258 by 85, we get 3 and a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 255 from 258 leaves us with 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 85

Step 4:
When dividing 33 by 85, we get 0 with a remainder of 33.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Subtracting 0 from 33 leaves us with 33.
Bring next digit (3) of the dividend behind the 33 and repeat the process: 333 / 85

Let's proceed to step 5:
85 can be fit into 333 3 times, resulting in a remainder of 78.
The next digit of our result is 3. 
Result so far: 303.0
The remainder is 78 after subtracting 255 from 333.
Bring next digit (9) of the dividend behind the 78 and repeat the process: 789 / 85

Advancing to step 6:
85 goes into 789 9 times with a remainder of 24.
Record the quotient 9 as the next digit in the result. 
Result so far: 3039.0
Deduct 765 from 789 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 7:
85 can be fit into 240 2 times, resulting in a remainder of 70.
Use 2 as the next digit of our solution. 
Result so far: 3039.2
Subtracting 170 from 240 leaves us 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.

Advancing to step 8:
85 goes into 700 8 times with a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 3039.28
Deduct 680 from 700 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.

Advancing to step 9:
85 goes into 200 2 times with a remainder of 30.
Record the quotient 2 as the next digit in the result. 
Result so far: 3039.282
If we subtract 170 from 200, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
85 can be fit into 300 3 times, resulting in a remainder of 45.
Put 3 as the next digit of the answer. 
Result so far: 3039.2823
If we subtract 255 from 300, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 11:
85 goes into 450 5 times with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 3039.28235
If we take 425 away from 450, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 12:
The number 85 fits into 250 2 times, leaving a remainder of 80.
Use 2 as the next digit of our solution. 
Result so far: 3039.282352
Subtract 170 from 250 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 13:
85 can be fit into 800 9 times, resulting in a remainder of 35.
The next digit of our result is 9. 
Result so far: 3039.2823529
The remainder is 35 after subtracting 765 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 14:
350 divided by 85 is 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 3039.28235294
If we take 340 away from 350, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 3039.28235294, with a leftover of 1e-08.