86839818 ÷ 66 
We want to divide 86839818 by 66.

Let's proceed to step 1:
66 goes into 8 0 times with 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.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 66

Moving on to step 2:
66 can be fit into 86 1 times, resulting in a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 66 from 86 to get 20.
Include the next digit (8) from the dividend after 20, then repeat: 208 / 66

Going ahead to step 3:
66 goes into 208 3 times with a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 13.0
Subtract 198 from 208 to get 10.
Bring next digit (3) of the dividend behind the 10 and repeat the process: 103 / 66

Going ahead to step 4:
66 goes into 103 1 times with a remainder of 37.
Put 1 as the next digit of the answer. 
Result so far: 131.0
Deduct 66 from 103 and we're left with 37.
Fetch the next digit (9) from the dividend, attach it to 37 and continue: 379 / 66

Advancing to step 5:
66 can be fit into 379 5 times, resulting in a remainder of 49.
The number 5 becomes the next digit in our result. 
Result so far: 1315.0
Subtracting 330 from 379 leaves us with 49.
Take the next digit (8) from the dividend and append it to 49, then repeat: 498 / 66

Step 6:
When dividing 498 by 66, we get 7 with a remainder of 36.
The number 7 becomes the next digit in our result. 
Result so far: 13157.0
The remainder is 36 after subtracting 462 from 498.
Grab the next digit (1) from the dividend, add it to 36, then carry on: 361 / 66

On to step 7:
The number 66 fits into 361 5 times, leaving a remainder of 31.
Use 5 as the next digit of our solution. 
Result so far: 131575.0
If we take 330 away from 361, we end up with 31.
Bring next digit (8) of the dividend behind the 31 and repeat the process: 318 / 66

Let's proceed to step 8:
The number 66 fits into 318 4 times, leaving a remainder of 54.
The next digit of our result is 4. 
Result so far: 1315754.0
The remainder is 54 after subtracting 264 from 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 9:
The number 66 fits into 540 8 times, leaving a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 1315754.8
If we subtract 528 from 540, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
66 can be fit into 120 1 times, resulting in a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 1315754.81
Subtract 66 from 120 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 11:
540 divided by 66 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 1315754.818
If we take 528 away from 540, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 12:
When dividing 120 by 66, we get 1 with a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 1315754.8181
If we take 66 away from 120, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 13:
540 divided by 66 is 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 1315754.81818
Deduct 528 from 540 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 14:
If we divide 120 by 66, we get 1 and a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 1315754.818181
Subtract 66 from 120 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 15:
66 can be fit into 540 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 1315754.8181818
Subtract 528 from 540 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 16:
66 can be fit into 120 1 times, resulting in a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 1315754.81818181
If we take 66 away from 120, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final result is 1315754.81818181 with a remainder of 5.4e-08.