25449811 ÷ 660 
We want to figure out the number of times 25449811 can be divided by 660.

Moving on to step 1:
2 divided by 660 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 660

On to step 2:
The number 660 fits into 25 0 times, leaving a remainder of 25.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Include the next digit (4) from the dividend after 25, then repeat: 254 / 660

Moving on to step 3:
When dividing 254 by 660, we get 0 with a remainder of 254.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 254 and we're left with 254.
Append the next digit (4) from the dividend to 254 and continue with: 2544 / 660

Step 4:
When dividing 2544 by 660, we get 3 with a remainder of 564.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 564 after subtracting 1980 from 2544.
Include the next digit (9) from the dividend after 564, then repeat: 5649 / 660

Moving on to step 5:
If we divide 5649 by 660, we get 8 and a remainder of 369.
Use 8 as the next digit of our solution. 
Result so far: 38.0
If we subtract 5280 from 5649, we get 369.
Fetch the next digit (8) from the dividend, attach it to 369 and continue: 3698 / 660

Advancing to step 6:
If we divide 3698 by 660, we get 5 and a remainder of 398.
The next digit of our result is 5. 
Result so far: 385.0
The remainder is 398 after subtracting 3300 from 3698.
Take the next digit (1) from the dividend and append it to 398, then repeat: 3981 / 660

Moving on to step 7:
660 can be fit into 3981 6 times, resulting in a remainder of 21.
Use 6 as the next digit of our solution. 
Result so far: 3856.0
Subtracting 3960 from 3981 leaves us with 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 660

Step 8:
The number 660 fits into 211 0 times, leaving a remainder of 211.
Use 0 as the next digit of our solution. 
Result so far: 38560.0
Subtracting 0 from 211 leaves us with 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Step 9:
2110 divided by 660 is 3 with a remainder of 130.
The number 3 becomes the next digit in our result. 
Result so far: 38560.3
The remainder is 130 after subtracting 1980 from 2110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 10:
660 can be fit into 1300 1 times, resulting in a remainder of 640.
Record the quotient 1 as the next digit in the result. 
Result so far: 38560.31
Subtracting 660 from 1300 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

On to step 11:
When dividing 6400 by 660, we get 9 with a remainder of 460.
Write down 9 as next digit of the result. 
Result so far: 38560.319
Subtract 5940 from 6400 to get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Advancing to step 12:
When dividing 4600 by 660, we get 6 with a remainder of 640.
Use 6 as the next digit of our solution. 
Result so far: 38560.3196
If we take 3960 away from 4600, we end up with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Going ahead to step 13:
The number 660 fits into 6400 9 times, leaving a remainder of 460.
Record the quotient 9 as the next digit in the result. 
Result so far: 38560.31969
Deduct 5940 from 6400 and we're left with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Let's proceed to step 14:
The number 660 fits into 4600 6 times, leaving a remainder of 640.
Write down 6 as next digit of the result. 
Result so far: 38560.319696
Subtracting 3960 from 4600 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Step 15:
The number 660 fits into 6400 9 times, leaving a remainder of 460.
Put 9 as the next digit of the answer. 
Result so far: 38560.3196969
The remainder is 460 after subtracting 5940 from 6400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Step 16:
660 goes into 4600 6 times with a remainder of 640.
The next digit of our result is 6. 
Result so far: 38560.31969696
Deduct 3960 from 4600 and we're left with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

After the division, we end up with 38560.31969696 and a remainder of 6.4e-07.