We look at the division of 393857 by 66 
Let's see how many times 66 fits into 393857.

Step 1:
66 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 66

Going ahead to step 2:
66 goes into 39 0 times with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Bring next digit (3) of the dividend behind the 39 and repeat the process: 393 / 66

Going ahead to step 3:
When dividing 393 by 66, we get 5 with a remainder of 63.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 330 away from 393, we end up with 63.
Grab the next digit (8) from the dividend, add it to 63, then carry on: 638 / 66

Advancing to step 4:
638 divided by 66 is 9 with a remainder of 44.
The next digit of our result is 9. 
Result so far: 59.0
The remainder is 44 after subtracting 594 from 638.
Take the next digit (5) from the dividend and append it to 44, then repeat: 445 / 66

Step 5:
66 can be fit into 445 6 times, resulting in a remainder of 49.
Record the quotient 6 as the next digit in the result. 
Result so far: 596.0
Deduct 396 from 445 and we're left with 49.
Append the next digit (7) from the dividend to 49 and continue with: 497 / 66

On to step 6:
The number 66 fits into 497 7 times, leaving a remainder of 35.
Record the quotient 7 as the next digit in the result. 
Result so far: 5967.0
Subtract 462 from 497 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 7:
The number 66 fits into 350 5 times, leaving a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 5967.5
Subtracting 330 from 350 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
If we divide 200 by 66, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 5967.53
Subtract 198 from 200 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
If we divide 20 by 66, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 5967.53
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
200 divided by 66 is 3 with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 5967.5303
If we subtract 198 from 200, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 11:
If we divide 20 by 66, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 5967.5303
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 12:
When dividing 200 by 66, we get 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 5967.530303
Deduct 198 from 200 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 13:
20 divided by 66 is 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 5967.530303
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 14:
If we divide 200 by 66, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 5967.53030303
Deduct 198 from 200 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

After the division, we end up with 5967.53030303 and a remainder of 2e-09.