We look at the division of 66510071 by 393 
Let's see how many times 393 fits into 66510071.

Moving on to step 1:
393 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 393

On to step 2:
393 can be fit into 66 0 times, resulting in a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Include the next digit (5) from the dividend after 66, then repeat: 665 / 393

Going ahead to step 3:
393 can be fit into 665 1 times, resulting in a remainder of 272.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 393 from 665 and we're left with 272.
Append the next digit (1) from the dividend to 272 and continue with: 2721 / 393

On to step 4:
393 goes into 2721 6 times with a remainder of 363.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Deduct 2358 from 2721 and we're left with 363.
Bring next digit (0) of the dividend behind the 363 and repeat the process: 3630 / 393

Advancing to step 5:
393 goes into 3630 9 times with a remainder of 93.
Record the quotient 9 as the next digit in the result. 
Result so far: 169.0
If we take 3537 away from 3630, we end up with 93.
Append the next digit (0) from the dividend to 93 and continue with: 930 / 393

Going ahead to step 6:
930 divided by 393 is 2 with a remainder of 144.
Put 2 as the next digit of the answer. 
Result so far: 1692.0
Deduct 786 from 930 and we're left with 144.
Bring next digit (7) of the dividend behind the 144 and repeat the process: 1447 / 393

On to step 7:
393 goes into 1447 3 times with a remainder of 268.
Use 3 as the next digit of our solution. 
Result so far: 16923.0
Subtract 1179 from 1447 to get 268.
Include the next digit (1) from the dividend after 268, then repeat: 2681 / 393

Moving on to step 8:
When dividing 2681 by 393, we get 6 with a remainder of 323.
Write down 6 as next digit of the result. 
Result so far: 169236.0
If we subtract 2358 from 2681, we get 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

On to step 9:
The number 393 fits into 3230 8 times, leaving a remainder of 86.
Record the quotient 8 as the next digit in the result. 
Result so far: 169236.8
If we take 3144 away from 3230, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 10:
393 can be fit into 860 2 times, resulting in a remainder of 74.
Record the quotient 2 as the next digit in the result. 
Result so far: 169236.82
Subtract 786 from 860 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 11:
393 can be fit into 740 1 times, resulting in a remainder of 347.
Write down 1 as next digit of the result. 
Result so far: 169236.821
Subtract 393 from 740 to get 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Advancing to step 12:
When dividing 3470 by 393, we get 8 with a remainder of 326.
Write down 8 as next digit of the result. 
Result so far: 169236.8218
If we take 3144 away from 3470, we end up with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Let's proceed to step 13:
When dividing 3260 by 393, we get 8 with a remainder of 116.
The next digit of our result is 8. 
Result so far: 169236.82188
Subtracting 3144 from 3260 leaves us with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

The final outcome is 169236.82188, with a leftover of 0.000116.