We're dividing 66393017 by 855 
We want to divide 66393017 by 855.

Advancing to step 1:
The number 855 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 855

Going ahead to step 2:
855 goes into 66 0 times with a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Bring next digit (3) of the dividend behind the 66 and repeat the process: 663 / 855

Step 3:
663 divided by 855 is 0 with a remainder of 663.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 663 after subtracting 0 from 663.
Take the next digit (9) from the dividend and append it to 663, then repeat: 6639 / 855

On to step 4:
6639 divided by 855 is 7 with a remainder of 654.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Deduct 5985 from 6639 and we're left with 654.
Append the next digit (3) from the dividend to 654 and continue with: 6543 / 855

Advancing to step 5:
6543 divided by 855 is 7 with a remainder of 558.
The next digit of our result is 7. 
Result so far: 77.0
Subtract 5985 from 6543 to get 558.
Include the next digit (0) from the dividend after 558, then repeat: 5580 / 855

Advancing to step 6:
5580 divided by 855 is 6 with a remainder of 450.
Write down 6 as next digit of the result. 
Result so far: 776.0
Subtracting 5130 from 5580 leaves us with 450.
Take the next digit (1) from the dividend and append it to 450, then repeat: 4501 / 855

On to step 7:
855 goes into 4501 5 times with a remainder of 226.
Record the quotient 5 as the next digit in the result. 
Result so far: 7765.0
Deduct 4275 from 4501 and we're left with 226.
Take the next digit (7) from the dividend and append it to 226, then repeat: 2267 / 855

Let's proceed to step 8:
855 goes into 2267 2 times with a remainder of 557.
Record the quotient 2 as the next digit in the result. 
Result so far: 77652.0
Subtracting 1710 from 2267 leaves us with 557.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5570, and continue the process.

Let's proceed to step 9:
5570 divided by 855 is 6 with a remainder of 440.
Use 6 as the next digit of our solution. 
Result so far: 77652.6
Deduct 5130 from 5570 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Step 10:
If we divide 4400 by 855, we get 5 and a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 77652.65
Subtract 4275 from 4400 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Let's proceed to step 11:
If we divide 1250 by 855, we get 1 and a remainder of 395.
Put 1 as the next digit of the answer. 
Result so far: 77652.651
Deduct 855 from 1250 and we're left with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Going ahead to step 12:
The number 855 fits into 3950 4 times, leaving a remainder of 530.
Write down 4 as next digit of the result. 
Result so far: 77652.6514
Deduct 3420 from 3950 and we're left with 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Going ahead to step 13:
The number 855 fits into 5300 6 times, leaving a remainder of 170.
Put 6 as the next digit of the answer. 
Result so far: 77652.65146
Subtract 5130 from 5300 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Moving on to step 14:
1700 divided by 855 is 1 with a remainder of 845.
The number 1 becomes the next digit in our result. 
Result so far: 77652.651461
If we subtract 855 from 1700, we get 845.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8450, and continue the process.

Let's proceed to step 15:
The number 855 fits into 8450 9 times, leaving a remainder of 755.
Put 9 as the next digit of the answer. 
Result so far: 77652.6514619
Subtracting 7695 from 8450 leaves us with 755.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7550, and continue the process.

Step 16:
855 can be fit into 7550 8 times, resulting in a remainder of 710.
Put 8 as the next digit of the answer. 
Result so far: 77652.65146198
If we subtract 6840 from 7550, we get 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7100, and continue the process.

Our division results in 77652.65146198 with a remaining 7.1e-07.