86664577 divided by 431 
Our goal is to divide 86664577 by 431.

Advancing to step 1:
If we divide 8 by 431, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 431

On to step 2:
431 can be fit into 86 0 times, resulting in a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Grab the next digit (6) from the dividend, add it to 86, then carry on: 866 / 431

Advancing to step 3:
The number 431 fits into 866 2 times, leaving a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 862 from 866 to get 4.
Bring next digit (6) of the dividend behind the 4 and repeat the process: 46 / 431

Let's proceed to step 4:
431 can be fit into 46 0 times, resulting in a remainder of 46.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtracting 0 from 46 leaves us with 46.
Grab the next digit (4) from the dividend, add it to 46, then carry on: 464 / 431

Going ahead to step 5:
When dividing 464 by 431, we get 1 with a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 201.0
Subtracting 431 from 464 leaves us with 33.
Fetch the next digit (5) from the dividend, attach it to 33 and continue: 335 / 431

Step 6:
431 can be fit into 335 0 times, resulting in a remainder of 335.
Record the quotient 0 as the next digit in the result. 
Result so far: 2010.0
Deduct 0 from 335 and we're left with 335.
Bring next digit (7) of the dividend behind the 335 and repeat the process: 3357 / 431

Advancing to step 7:
3357 divided by 431 is 7 with a remainder of 340.
Write down 7 as next digit of the result. 
Result so far: 20107.0
If we take 3017 away from 3357, we end up with 340.
Bring next digit (7) of the dividend behind the 340 and repeat the process: 3407 / 431

Going ahead to step 8:
When dividing 3407 by 431, we get 7 with a remainder of 390.
Put 7 as the next digit of the answer. 
Result so far: 201077.0
If we subtract 3017 from 3407, we get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Going ahead to step 9:
If we divide 3900 by 431, we get 9 and a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 201077.9
The remainder is 21 after subtracting 3879 from 3900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 10:
210 divided by 431 is 0 with a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 201077.9
Subtract 0 from 210 to get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Step 11:
2100 divided by 431 is 4 with a remainder of 376.
The number 4 becomes the next digit in our result. 
Result so far: 201077.904
The remainder is 376 after subtracting 1724 from 2100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

On to step 12:
431 can be fit into 3760 8 times, resulting in a remainder of 312.
Write down 8 as next digit of the result. 
Result so far: 201077.9048
If we subtract 3448 from 3760, we get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Advancing to step 13:
When dividing 3120 by 431, we get 7 with a remainder of 103.
Write down 7 as next digit of the result. 
Result so far: 201077.90487
Subtract 3017 from 3120 to get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Going ahead to step 14:
The number 431 fits into 1030 2 times, leaving a remainder of 168.
Record the quotient 2 as the next digit in the result. 
Result so far: 201077.904872
Deduct 862 from 1030 and we're left with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Going ahead to step 15:
1680 divided by 431 is 3 with a remainder of 387.
Record the quotient 3 as the next digit in the result. 
Result so far: 201077.9048723
If we subtract 1293 from 1680, we get 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Going ahead to step 16:
431 can be fit into 3870 8 times, resulting in a remainder of 422.
Put 8 as the next digit of the answer. 
Result so far: 201077.90487238
If we take 3448 away from 3870, we end up with 422.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

The final outcome is 201077.90487238, with a leftover of 4.22e-07.