66061908 ÷ 25 
We want to figure out the number of times 66061908 can be divided by 25.

On to step 1:
The number 25 fits into 6 0 times, leaving 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.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 25

On to step 2:
The number 25 fits into 66 2 times, leaving a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 50 from 66 to get 16.
Bring next digit (0) of the dividend behind the 16 and repeat the process: 160 / 25

On to step 3:
25 can be fit into 160 6 times, resulting in a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 26.0
If we subtract 150 from 160, we get 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 25

Going ahead to step 4:
When dividing 106 by 25, we get 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 264.0
Deduct 100 from 106 and we're left with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 25

Let's proceed to step 5:
25 goes into 61 2 times with a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 2642.0
The remainder is 11 after subtracting 50 from 61.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 25

Moving on to step 6:
119 divided by 25 is 4 with a remainder of 19.
Record the quotient 4 as the next digit in the result. 
Result so far: 26424.0
Subtract 100 from 119 to get 19.
Grab the next digit (0) from the dividend, add it to 19, then carry on: 190 / 25

On to step 7:
25 can be fit into 190 7 times, resulting in a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 264247.0
The remainder is 15 after subtracting 175 from 190.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 25

On to step 8:
The number 25 fits into 158 6 times, leaving a remainder of 8.
The next digit of our result is 6. 
Result so far: 2642476.0
If we subtract 150 from 158, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
When dividing 80 by 25, we get 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 2642476.3
The remainder is 5 after subtracting 75 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 10:
25 can be fit into 50 2 times, resulting in a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2642476.32
Subtracting 50 from 50 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
25 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 2642476.32
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 12:
If we divide 0 by 25, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 2642476.32
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 2642476.32 and a remainder of 0.0.