25912934 divided by 661 
Our goal is to divide 25912934 by 661.

Step 1:
2 divided by 661 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 661

Going ahead to step 2:
25 divided by 661 is 0 with a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Include the next digit (9) from the dividend after 25, then repeat: 259 / 661

On to step 3:
The number 661 fits into 259 0 times, leaving a remainder of 259.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 259 to get 259.
Fetch the next digit (1) from the dividend, attach it to 259 and continue: 2591 / 661

Moving on to step 4:
661 can be fit into 2591 3 times, resulting in a remainder of 608.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 1983 from 2591 and we're left with 608.
Include the next digit (2) from the dividend after 608, then repeat: 6082 / 661

Going ahead to step 5:
When dividing 6082 by 661, we get 9 with a remainder of 133.
Use 9 as the next digit of our solution. 
Result so far: 39.0
If we take 5949 away from 6082, we end up with 133.
Append the next digit (9) from the dividend to 133 and continue with: 1339 / 661

On to step 6:
661 goes into 1339 2 times with a remainder of 17.
Use 2 as the next digit of our solution. 
Result so far: 392.0
Deduct 1322 from 1339 and we're left with 17.
Fetch the next digit (3) from the dividend, attach it to 17 and continue: 173 / 661

Going ahead to step 7:
661 can be fit into 173 0 times, resulting in a remainder of 173.
Record the quotient 0 as the next digit in the result. 
Result so far: 3920.0
The remainder is 173 after subtracting 0 from 173.
Include the next digit (4) from the dividend after 173, then repeat: 1734 / 661

Going ahead to step 8:
661 goes into 1734 2 times with a remainder of 412.
Record the quotient 2 as the next digit in the result. 
Result so far: 39202.0
Deduct 1322 from 1734 and we're left with 412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

Moving on to step 9:
If we divide 4120 by 661, we get 6 and a remainder of 154.
Put 6 as the next digit of the answer. 
Result so far: 39202.6
Subtracting 3966 from 4120 leaves us with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Moving on to step 10:
661 can be fit into 1540 2 times, resulting in a remainder of 218.
The next digit of our result is 2. 
Result so far: 39202.62
Subtracting 1322 from 1540 leaves us with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Going ahead to step 11:
The number 661 fits into 2180 3 times, leaving a remainder of 197.
Put 3 as the next digit of the answer. 
Result so far: 39202.623
Subtracting 1983 from 2180 leaves us with 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Step 12:
The number 661 fits into 1970 2 times, leaving a remainder of 648.
The number 2 becomes the next digit in our result. 
Result so far: 39202.6232
If we take 1322 away from 1970, we end up with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Advancing to step 13:
661 can be fit into 6480 9 times, resulting in a remainder of 531.
Use 9 as the next digit of our solution. 
Result so far: 39202.62329
The remainder is 531 after subtracting 5949 from 6480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Step 14:
The number 661 fits into 5310 8 times, leaving a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 39202.623298
Deduct 5288 from 5310 and we're left with 22.
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 15:
220 divided by 661 is 0 with a remainder of 220.
Use 0 as the next digit of our solution. 
Result so far: 39202.623298
Subtracting 0 from 220 leaves us 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.

Let's proceed to step 16:
661 can be fit into 2200 3 times, resulting in a remainder of 217.
The number 3 becomes the next digit in our result. 
Result so far: 39202.62329803
Subtract 1983 from 2200 to get 217.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

The quotient of the division is 39202.62329803, and the remainder is 2.17e-07.