We look at the division of 53805383 by 666 
We want to divide 53805383 by 666.

Step 1:
666 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 666

On to step 2:
If we divide 53 by 666, we get 0 and a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Include the next digit (8) from the dividend after 53, then repeat: 538 / 666

Moving on to step 3:
The number 666 fits into 538 0 times, leaving a remainder of 538.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 538 after subtracting 0 from 538.
Fetch the next digit (0) from the dividend, attach it to 538 and continue: 5380 / 666

Step 4:
5380 divided by 666 is 8 with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 5328 from 5380 leaves us with 52.
Include the next digit (5) from the dividend after 52, then repeat: 525 / 666

Advancing to step 5:
666 goes into 525 0 times with a remainder of 525.
Put 0 as the next digit of the answer. 
Result so far: 80.0
The remainder is 525 after subtracting 0 from 525.
Bring next digit (3) of the dividend behind the 525 and repeat the process: 5253 / 666

Going ahead to step 6:
When dividing 5253 by 666, we get 7 with a remainder of 591.
Put 7 as the next digit of the answer. 
Result so far: 807.0
If we subtract 4662 from 5253, we get 591.
Fetch the next digit (8) from the dividend, attach it to 591 and continue: 5918 / 666

On to step 7:
666 can be fit into 5918 8 times, resulting in a remainder of 590.
Put 8 as the next digit of the answer. 
Result so far: 8078.0
Subtracting 5328 from 5918 leaves us with 590.
Append the next digit (3) from the dividend to 590 and continue with: 5903 / 666

Moving on to step 8:
The number 666 fits into 5903 8 times, leaving a remainder of 575.
The next digit of our result is 8. 
Result so far: 80788.0
Subtract 5328 from 5903 to get 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Let's proceed to step 9:
666 goes into 5750 8 times with a remainder of 422.
The next digit of our result is 8. 
Result so far: 80788.8
If we take 5328 away from 5750, 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.

On to step 10:
666 goes into 4220 6 times with a remainder of 224.
Use 6 as the next digit of our solution. 
Result so far: 80788.86
The remainder is 224 after subtracting 3996 from 4220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Step 11:
When dividing 2240 by 666, we get 3 with a remainder of 242.
Record the quotient 3 as the next digit in the result. 
Result so far: 80788.863
Subtract 1998 from 2240 to get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Moving on to step 12:
If we divide 2420 by 666, we get 3 and a remainder of 422.
The next digit of our result is 3. 
Result so far: 80788.8633
Deduct 1998 from 2420 and we're left 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 80788.8633, with a leftover of 0.00422.