Let's divide 81579948 by 66
We want to divide 81579948 by 66.

Moving on to step 1:
The number 66 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 66

Going ahead to step 2:
66 can be fit into 81 1 times, resulting in a remainder of 15.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 66 from 81, we get 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 66

Moving on to step 3:
66 can be fit into 155 2 times, resulting in a remainder of 23.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we take 132 away from 155, we end up with 23.
Take the next digit (7) from the dividend and append it to 23, then repeat: 237 / 66

Moving on to step 4:
The number 66 fits into 237 3 times, leaving a remainder of 39.
Record the quotient 3 as the next digit in the result. 
Result so far: 123.0
Subtracting 198 from 237 leaves us with 39.
Append the next digit (9) from the dividend to 39 and continue with: 399 / 66

Going ahead to step 5:
399 divided by 66 is 6 with a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 1236.0
The remainder is 3 after subtracting 396 from 399.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 66

Going ahead to step 6:
If we divide 39 by 66, we get 0 and a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 12360.0
Subtracting 0 from 39 leaves us with 39.
Fetch the next digit (4) from the dividend, attach it to 39 and continue: 394 / 66

Moving on to step 7:
394 divided by 66 is 5 with a remainder of 64.
The number 5 becomes the next digit in our result. 
Result so far: 123605.0
Deduct 330 from 394 and we're left with 64.
Take the next digit (8) from the dividend and append it to 64, then repeat: 648 / 66

Moving on to step 8:
When dividing 648 by 66, we get 9 with a remainder of 54.
Use 9 as the next digit of our solution. 
Result so far: 1236059.0
Subtract 594 from 648 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.

Step 9:
The number 66 fits into 540 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 1236059.8
Subtracting 528 from 540 leaves us 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.

Going ahead to step 10:
If we divide 120 by 66, we get 1 and a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 1236059.81
Subtracting 66 from 120 leaves us 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.

Going ahead to step 11:
The number 66 fits into 540 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 1236059.818
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.

Moving on to step 12:
The number 66 fits into 120 1 times, leaving a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 1236059.8181
Deduct 66 from 120 and we're left 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: 1236059.81818
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.

Step 14:
If we divide 120 by 66, we get 1 and a remainder of 54.
The number 1 becomes the next digit in our result. 
Result so far: 1236059.818181
Subtracting 66 from 120 leaves us 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.

Step 15:
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: 1236059.8181818
Subtracting 528 from 540 leaves us 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 16:
If we divide 120 by 66, we get 1 and a remainder of 54.
The next digit of our result is 1. 
Result so far: 1236059.81818181
If we subtract 66 from 120, we 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.

After the division, we end up with 1236059.81818181 and a remainder of 5.4e-08.