We divide 801129 by 66
Let's see how many times 66 fits into 801129.

Advancing to step 1:
8 divided by 66 is 0 with 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.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 66

Moving on to step 2:
80 divided by 66 is 1 with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 66 from 80, we get 14.
Take the next digit (1) from the dividend and append it to 14, then repeat: 141 / 66

Going ahead to step 3:
66 can be fit into 141 2 times, resulting in a remainder of 9.
The next digit of our result is 2. 
Result so far: 12.0
Subtracting 132 from 141 leaves us with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 66

Let's proceed to step 4:
66 can be fit into 91 1 times, resulting in a remainder of 25.
The next digit of our result is 1. 
Result so far: 121.0
If we subtract 66 from 91, we get 25.
Fetch the next digit (2) from the dividend, attach it to 25 and continue: 252 / 66

Moving on to step 5:
The number 66 fits into 252 3 times, leaving a remainder of 54.
Put 3 as the next digit of the answer. 
Result so far: 1213.0
Deduct 198 from 252 and we're left with 54.
Grab the next digit (9) from the dividend, add it to 54, then carry on: 549 / 66

Moving on to step 6:
66 can be fit into 549 8 times, resulting in a remainder of 21.
Put 8 as the next digit of the answer. 
Result so far: 12138.0
The remainder is 21 after subtracting 528 from 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
The number 66 fits into 210 3 times, leaving a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 12138.3
The remainder is 12 after subtracting 198 from 210.
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 8:
120 divided by 66 is 1 with a remainder of 54.
The number 1 becomes the next digit in our result. 
Result so far: 12138.31
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.

Advancing to step 9:
If we divide 540 by 66, we get 8 and a remainder of 12.
The next digit of our result is 8. 
Result so far: 12138.318
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.

Advancing to step 10:
If we divide 120 by 66, we get 1 and a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 12138.3181
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.

Moving on to step 11:
66 can be fit into 540 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 12138.31818
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.

On to step 12:
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: 12138.318181
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.

Moving on to step 13:
540 divided by 66 is 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 12138.3181818
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.

Step 14:
66 goes into 120 1 times with a remainder of 54.
Use 1 as the next digit of our solution. 
Result so far: 12138.31818181
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.

The final outcome is 12138.31818181, with a leftover of 5.4e-08.