We look at the division of 66099870 by 959 
We're looking to find how many times 959 goes into 66099870.

Step 1:
959 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
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 / 959

On to step 2:
The number 959 fits into 66 0 times, leaving a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Append the next digit (0) from the dividend to 66 and continue with: 660 / 959

On to step 3:
959 goes into 660 0 times with a remainder of 660.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 660, we end up with 660.
Fetch the next digit (9) from the dividend, attach it to 660 and continue: 6609 / 959

On to step 4:
6609 divided by 959 is 6 with a remainder of 855.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 5754 away from 6609, we end up with 855.
Append the next digit (9) from the dividend to 855 and continue with: 8559 / 959

Let's proceed to step 5:
If we divide 8559 by 959, we get 8 and a remainder of 887.
Write down 8 as next digit of the result. 
Result so far: 68.0
Subtracting 7672 from 8559 leaves us with 887.
Bring next digit (8) of the dividend behind the 887 and repeat the process: 8878 / 959

Step 6:
When dividing 8878 by 959, we get 9 with a remainder of 247.
Use 9 as the next digit of our solution. 
Result so far: 689.0
Subtract 8631 from 8878 to get 247.
Append the next digit (7) from the dividend to 247 and continue with: 2477 / 959

Moving on to step 7:
959 can be fit into 2477 2 times, resulting in a remainder of 559.
The number 2 becomes the next digit in our result. 
Result so far: 6892.0
If we subtract 1918 from 2477, we get 559.
Take the next digit (0) from the dividend and append it to 559, then repeat: 5590 / 959

Moving on to step 8:
959 goes into 5590 5 times with a remainder of 795.
The number 5 becomes the next digit in our result. 
Result so far: 68925.0
Deduct 4795 from 5590 and we're left with 795.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7950, and continue the process.

Let's proceed to step 9:
The number 959 fits into 7950 8 times, leaving a remainder of 278.
The next digit of our result is 8. 
Result so far: 68925.8
The remainder is 278 after subtracting 7672 from 7950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Step 10:
When dividing 2780 by 959, we get 2 with a remainder of 862.
Use 2 as the next digit of our solution. 
Result so far: 68925.82
Deduct 1918 from 2780 and we're left with 862.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8620, and continue the process.

Step 11:
The number 959 fits into 8620 8 times, leaving a remainder of 948.
Use 8 as the next digit of our solution. 
Result so far: 68925.828
Subtracting 7672 from 8620 leaves us with 948.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9480, and continue the process.

Moving on to step 12:
959 goes into 9480 9 times with a remainder of 849.
Put 9 as the next digit of the answer. 
Result so far: 68925.8289
If we take 8631 away from 9480, we end up with 849.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8490, and continue the process.

Step 13:
When dividing 8490 by 959, we get 8 with a remainder of 818.
Put 8 as the next digit of the answer. 
Result so far: 68925.82898
Subtracting 7672 from 8490 leaves us with 818.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8180, and continue the process.

On to step 14:
The number 959 fits into 8180 8 times, leaving a remainder of 508.
The next digit of our result is 8. 
Result so far: 68925.828988
Deduct 7672 from 8180 and we're left with 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

The final result is 68925.828988 with a remainder of 5.08e-05.