66609918 divided by 878 
We want to figure out the number of times 66609918 can be divided by 878.

Let's proceed to step 1:
878 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 878

Going ahead to step 2:
If we divide 66 by 878, we get 0 and 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.
Fetch the next digit (6) from the dividend, attach it to 66 and continue: 666 / 878

On to step 3:
878 can be fit into 666 0 times, resulting in a remainder of 666.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 666, we get 666.
Bring next digit (0) of the dividend behind the 666 and repeat the process: 6660 / 878

Advancing to step 4:
878 goes into 6660 7 times with a remainder of 514.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 6146 from 6660 to get 514.
Fetch the next digit (9) from the dividend, attach it to 514 and continue: 5149 / 878

Moving on to step 5:
The number 878 fits into 5149 5 times, leaving a remainder of 759.
The next digit of our result is 5. 
Result so far: 75.0
Subtracting 4390 from 5149 leaves us with 759.
Bring next digit (9) of the dividend behind the 759 and repeat the process: 7599 / 878

Moving on to step 6:
7599 divided by 878 is 8 with a remainder of 575.
Record the quotient 8 as the next digit in the result. 
Result so far: 758.0
The remainder is 575 after subtracting 7024 from 7599.
Take the next digit (1) from the dividend and append it to 575, then repeat: 5751 / 878

Moving on to step 7:
If we divide 5751 by 878, we get 6 and a remainder of 483.
Put 6 as the next digit of the answer. 
Result so far: 7586.0
The remainder is 483 after subtracting 5268 from 5751.
Include the next digit (8) from the dividend after 483, then repeat: 4838 / 878

Step 8:
If we divide 4838 by 878, we get 5 and a remainder of 448.
Put 5 as the next digit of the answer. 
Result so far: 75865.0
Subtract 4390 from 4838 to get 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

On to step 9:
4480 divided by 878 is 5 with a remainder of 90.
Use 5 as the next digit of our solution. 
Result so far: 75865.5
Subtracting 4390 from 4480 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 10:
If we divide 900 by 878, we get 1 and a remainder of 22.
The next digit of our result is 1. 
Result so far: 75865.51
The remainder is 22 after subtracting 878 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 11:
If we divide 220 by 878, we get 0 and a remainder of 220.
The number 0 becomes the next digit in our result. 
Result so far: 75865.51
If we take 0 away from 220, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 12:
When dividing 2200 by 878, we get 2 with a remainder of 444.
The next digit of our result is 2. 
Result so far: 75865.5102
The remainder is 444 after subtracting 1756 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Let's proceed to step 13:
878 can be fit into 4440 5 times, resulting in a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 75865.51025
The remainder is 50 after subtracting 4390 from 4440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 14:
878 can be fit into 500 0 times, resulting in a remainder of 500.
Write down 0 as next digit of the result. 
Result so far: 75865.51025
Subtracting 0 from 500 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Let's proceed to step 15:
The number 878 fits into 5000 5 times, leaving a remainder of 610.
Write down 5 as next digit of the result. 
Result so far: 75865.5102505
Deduct 4390 from 5000 and we're left with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Moving on to step 16:
6100 divided by 878 is 6 with a remainder of 832.
The number 6 becomes the next digit in our result. 
Result so far: 75865.51025056
Subtracting 5268 from 6100 leaves us with 832.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8320, and continue the process.

In conclusion, the division gives 75865.51025056 with a balance of 8.32e-07.