123961 ÷ 25 
Our goal is to divide 123961 by 25.

Step 1:
25 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 25

Advancing to step 2:
When dividing 12 by 25, we get 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 25

On to step 3:
123 divided by 25 is 4 with a remainder of 23.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 100 from 123 to get 23.
Bring next digit (9) of the dividend behind the 23 and repeat the process: 239 / 25

On to step 4:
239 divided by 25 is 9 with a remainder of 14.
Put 9 as the next digit of the answer. 
Result so far: 49.0
If we take 225 away from 239, we end up with 14.
Include the next digit (6) from the dividend after 14, then repeat: 146 / 25

Moving on to step 5:
If we divide 146 by 25, we get 5 and a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 495.0
Subtracting 125 from 146 leaves us with 21.
Grab the next digit (1) from the dividend, add it to 21, then carry on: 211 / 25

Moving on to step 6:
When dividing 211 by 25, we get 8 with a remainder of 11.
Use 8 as the next digit of our solution. 
Result so far: 4958.0
The remainder is 11 after subtracting 200 from 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
If we divide 110 by 25, we get 4 and a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 4958.4
Deduct 100 from 110 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
25 can be fit into 100 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 4958.44
Deduct 100 from 100 and we're left 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.

The final outcome is 4958.44, with a leftover of 0.0.