86101421 divided by 25 
Our goal is to divide 86101421 by 25.

Step 1:
If we divide 8 by 25, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 25

On to step 2:
When dividing 86 by 25, we get 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 75 from 86, we get 11.
Include the next digit (1) from the dividend after 11, then repeat: 111 / 25

Step 3:
If we divide 111 by 25, we get 4 and a remainder of 11.
The next digit of our result is 4. 
Result so far: 34.0
If we take 100 away from 111, we end up with 11.
Include the next digit (0) from the dividend after 11, then repeat: 110 / 25

Moving on to step 4:
25 goes into 110 4 times with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 344.0
The remainder is 10 after subtracting 100 from 110.
Fetch the next digit (1) from the dividend, attach it to 10 and continue: 101 / 25

Step 5:
101 divided by 25 is 4 with a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 3444.0
If we take 100 away from 101, we end up with 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 25

On to step 6:
When dividing 14 by 25, we get 0 with a remainder of 14.
Use 0 as the next digit of our solution. 
Result so far: 34440.0
Subtracting 0 from 14 leaves us with 14.
Bring next digit (2) of the dividend behind the 14 and repeat the process: 142 / 25

Going ahead to step 7:
If we divide 142 by 25, we get 5 and a remainder of 17.
The next digit of our result is 5. 
Result so far: 344405.0
If we subtract 125 from 142, we get 17.
Append the next digit (1) from the dividend to 17 and continue with: 171 / 25

On to step 8:
When dividing 171 by 25, we get 6 with a remainder of 21.
Record the quotient 6 as the next digit in the result. 
Result so far: 3444056.0
Deduct 150 from 171 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 9:
210 divided by 25 is 8 with a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 3444056.8
If we take 200 away from 210, we end up 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.

Step 10:
The number 25 fits into 100 4 times, leaving a remainder of 0.
The next digit of our result is 4. 
Result so far: 3444056.84
If we take 100 away from 100, 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.

Step 11:
When dividing 0 by 25, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 3444056.84
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.

Moving on to step 12:
When dividing 0 by 25, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3444056.84
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.

The quotient of the division is 3444056.84, and the remainder is 0.0.