We look at the division of 86409809 by 279 
We want to figure out the number of times 86409809 can be divided by 279.

On to step 1:
When dividing 8 by 279, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 279

On to step 2:
The number 279 fits into 86 0 times, leaving a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Fetch the next digit (4) from the dividend, attach it to 86 and continue: 864 / 279

Step 3:
279 can be fit into 864 3 times, resulting in a remainder of 27.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 837 from 864 to get 27.
Bring next digit (0) of the dividend behind the 27 and repeat the process: 270 / 279

Step 4:
279 goes into 270 0 times with a remainder of 270.
Write down 0 as next digit of the result. 
Result so far: 30.0
If we take 0 away from 270, we end up with 270.
Grab the next digit (9) from the dividend, add it to 270, then carry on: 2709 / 279

Moving on to step 5:
The number 279 fits into 2709 9 times, leaving a remainder of 198.
Use 9 as the next digit of our solution. 
Result so far: 309.0
Deduct 2511 from 2709 and we're left with 198.
Fetch the next digit (8) from the dividend, attach it to 198 and continue: 1988 / 279

Let's proceed to step 6:
The number 279 fits into 1988 7 times, leaving a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 3097.0
The remainder is 35 after subtracting 1953 from 1988.
Take the next digit (0) from the dividend and append it to 35, then repeat: 350 / 279

On to step 7:
350 divided by 279 is 1 with a remainder of 71.
The number 1 becomes the next digit in our result. 
Result so far: 30971.0
If we take 279 away from 350, we end up with 71.
Take the next digit (9) from the dividend and append it to 71, then repeat: 719 / 279

Let's proceed to step 8:
When dividing 719 by 279, we get 2 with a remainder of 161.
The number 2 becomes the next digit in our result. 
Result so far: 309712.0
Subtract 558 from 719 to get 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Going ahead to step 9:
The number 279 fits into 1610 5 times, leaving a remainder of 215.
Record the quotient 5 as the next digit in the result. 
Result so far: 309712.5
If we subtract 1395 from 1610, we get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Moving on to step 10:
279 goes into 2150 7 times with a remainder of 197.
Put 7 as the next digit of the answer. 
Result so far: 309712.57
Subtracting 1953 from 2150 leaves us with 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

On to step 11:
When dividing 1970 by 279, we get 7 with a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 309712.577
Subtracting 1953 from 1970 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final outcome is 309712.577, with a leftover of 0.0017.