553815 divided by 66 
We want to divide 553815 by 66.

On to step 1:
5 divided by 66 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 66

Let's proceed to step 2:
55 divided by 66 is 0 with a remainder of 55.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 55 and we're left with 55.
Fetch the next digit (3) from the dividend, attach it to 55 and continue: 553 / 66

Advancing to step 3:
When dividing 553 by 66, we get 8 with a remainder of 25.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 25 after subtracting 528 from 553.
Take the next digit (8) from the dividend and append it to 25, then repeat: 258 / 66

Advancing to step 4:
When dividing 258 by 66, we get 3 with a remainder of 60.
Put 3 as the next digit of the answer. 
Result so far: 83.0
If we take 198 away from 258, we end up with 60.
Bring next digit (1) of the dividend behind the 60 and repeat the process: 601 / 66

Going ahead to step 5:
66 goes into 601 9 times with a remainder of 7.
The next digit of our result is 9. 
Result so far: 839.0
If we subtract 594 from 601, we get 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 66

On to step 6:
66 goes into 75 1 times with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 8391.0
If we subtract 66 from 75, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
66 goes into 90 1 times with a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 8391.1
If we subtract 66 from 90, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 8:
240 divided by 66 is 3 with a remainder of 42.
Record the quotient 3 as the next digit in the result. 
Result so far: 8391.13
Subtract 198 from 240 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 9:
66 goes into 420 6 times with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 8391.136
Subtract 396 from 420 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 10:
66 goes into 240 3 times with a remainder of 42.
Record the quotient 3 as the next digit in the result. 
Result so far: 8391.1363
The remainder is 42 after subtracting 198 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 11:
The number 66 fits into 420 6 times, leaving a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 8391.13636
The remainder is 24 after subtracting 396 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
If we divide 240 by 66, we get 3 and a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 8391.136363
Deduct 198 from 240 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 13:
66 goes into 420 6 times with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 8391.1363636
The remainder is 24 after subtracting 396 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 14:
240 divided by 66 is 3 with a remainder of 42.
Record the quotient 3 as the next digit in the result. 
Result so far: 8391.13636363
If we subtract 198 from 240, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

The final result is 8391.13636363 with a remainder of 4.2e-08.