We're dividing 66599939 by 935 
We want to divide 66599939 by 935.

Let's proceed to step 1:
The number 935 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 935

Step 2:
935 goes into 66 0 times with 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.
Append the next digit (5) from the dividend to 66 and continue with: 665 / 935

Step 3:
The number 935 fits into 665 0 times, leaving a remainder of 665.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 665 to get 665.
Take the next digit (9) from the dividend and append it to 665, then repeat: 6659 / 935

Moving on to step 4:
The number 935 fits into 6659 7 times, leaving a remainder of 114.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 6545 from 6659 to get 114.
Append the next digit (9) from the dividend to 114 and continue with: 1149 / 935

On to step 5:
1149 divided by 935 is 1 with a remainder of 214.
The next digit of our result is 1. 
Result so far: 71.0
Deduct 935 from 1149 and we're left with 214.
Append the next digit (9) from the dividend to 214 and continue with: 2149 / 935

Moving on to step 6:
The number 935 fits into 2149 2 times, leaving a remainder of 279.
Use 2 as the next digit of our solution. 
Result so far: 712.0
Subtract 1870 from 2149 to get 279.
Include the next digit (3) from the dividend after 279, then repeat: 2793 / 935

Step 7:
The number 935 fits into 2793 2 times, leaving a remainder of 923.
Use 2 as the next digit of our solution. 
Result so far: 7122.0
Subtract 1870 from 2793 to get 923.
Fetch the next digit (9) from the dividend, attach it to 923 and continue: 9239 / 935

Let's proceed to step 8:
935 can be fit into 9239 9 times, resulting in a remainder of 824.
The next digit of our result is 9. 
Result so far: 71229.0
The remainder is 824 after subtracting 8415 from 9239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8240, and continue the process.

Let's proceed to step 9:
935 goes into 8240 8 times with a remainder of 760.
Put 8 as the next digit of the answer. 
Result so far: 71229.8
If we subtract 7480 from 8240, we get 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Advancing to step 10:
The number 935 fits into 7600 8 times, leaving a remainder of 120.
Use 8 as the next digit of our solution. 
Result so far: 71229.88
If we take 7480 away from 7600, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final result is 71229.88 with a remainder of 0.12.