86420647 ÷ 566 
We want to figure out the number of times 86420647 can be divided by 566.

Step 1:
566 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 566

Advancing to step 2:
The number 566 fits into 86 0 times, leaving a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Include the next digit (4) from the dividend after 86, then repeat: 864 / 566

Advancing to step 3:
When dividing 864 by 566, we get 1 with a remainder of 298.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 566 from 864 leaves us with 298.
Append the next digit (2) from the dividend to 298 and continue with: 2982 / 566

Advancing to step 4:
When dividing 2982 by 566, we get 5 with a remainder of 152.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtracting 2830 from 2982 leaves us with 152.
Grab the next digit (0) from the dividend, add it to 152, then carry on: 1520 / 566

On to step 5:
If we divide 1520 by 566, we get 2 and a remainder of 388.
The number 2 becomes the next digit in our result. 
Result so far: 152.0
Subtract 1132 from 1520 to get 388.
Take the next digit (6) from the dividend and append it to 388, then repeat: 3886 / 566

On to step 6:
The number 566 fits into 3886 6 times, leaving a remainder of 490.
Write down 6 as next digit of the result. 
Result so far: 1526.0
Deduct 3396 from 3886 and we're left with 490.
Take the next digit (4) from the dividend and append it to 490, then repeat: 4904 / 566

Step 7:
4904 divided by 566 is 8 with a remainder of 376.
Put 8 as the next digit of the answer. 
Result so far: 15268.0
Deduct 4528 from 4904 and we're left with 376.
Take the next digit (7) from the dividend and append it to 376, then repeat: 3767 / 566

Let's proceed to step 8:
566 goes into 3767 6 times with a remainder of 371.
Record the quotient 6 as the next digit in the result. 
Result so far: 152686.0
If we subtract 3396 from 3767, we get 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Moving on to step 9:
566 goes into 3710 6 times with a remainder of 314.
Record the quotient 6 as the next digit in the result. 
Result so far: 152686.6
The remainder is 314 after subtracting 3396 from 3710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Let's proceed to step 10:
If we divide 3140 by 566, we get 5 and a remainder of 310.
Use 5 as the next digit of our solution. 
Result so far: 152686.65
Deduct 2830 from 3140 and we're left with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Step 11:
When dividing 3100 by 566, we get 5 with a remainder of 270.
The next digit of our result is 5. 
Result so far: 152686.655
The remainder is 270 after subtracting 2830 from 3100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

The final outcome is 152686.655, with a leftover of 0.027.