309547 ÷ 86 
Our goal is to divide 309547 by 86.

On to step 1:
When dividing 3 by 86, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 86

Step 2:
86 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 30, we get 30.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 86

On to step 3:
When dividing 309 by 86, we get 3 with a remainder of 51.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 51 after subtracting 258 from 309.
Append the next digit (5) from the dividend to 51 and continue with: 515 / 86

Step 4:
86 goes into 515 5 times with a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 35.0
If we take 430 away from 515, we end up with 85.
Grab the next digit (4) from the dividend, add it to 85, then carry on: 854 / 86

Let's proceed to step 5:
854 divided by 86 is 9 with a remainder of 80.
Put 9 as the next digit of the answer. 
Result so far: 359.0
Subtract 774 from 854 to get 80.
Fetch the next digit (7) from the dividend, attach it to 80 and continue: 807 / 86

Advancing to step 6:
86 can be fit into 807 9 times, resulting in a remainder of 33.
Record the quotient 9 as the next digit in the result. 
Result so far: 3599.0
Deduct 774 from 807 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 7:
The number 86 fits into 330 3 times, leaving a remainder of 72.
The next digit of our result is 3. 
Result so far: 3599.3
Subtract 258 from 330 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 8:
When dividing 720 by 86, we get 8 with a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 3599.38
If we take 688 away from 720, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 9:
If we divide 320 by 86, we get 3 and a remainder of 62.
Record the quotient 3 as the next digit in the result. 
Result so far: 3599.383
If we subtract 258 from 320, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 10:
The number 86 fits into 620 7 times, leaving a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 3599.3837
If we take 602 away from 620, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 11:
When dividing 180 by 86, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 3599.38372
Subtract 172 from 180 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
The number 86 fits into 80 0 times, leaving a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 3599.38372
If we subtract 0 from 80, we 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.

Let's proceed to step 13:
When dividing 800 by 86, we get 9 with a remainder of 26.
Put 9 as the next digit of the answer. 
Result so far: 3599.3837209
Deduct 774 from 800 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 14:
86 can be fit into 260 3 times, resulting in a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 3599.38372093
If we take 258 away from 260, we end up 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.

In conclusion, the division gives 3599.38372093 with a balance of 2e-09.