79902686 divided by 25 
We want to figure out the number of times 79902686 can be divided by 25.

Step 1:
25 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 25

Going ahead to step 2:
25 can be fit into 79 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 4 after subtracting 75 from 79.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 25

Moving on to step 3:
When dividing 49 by 25, we get 1 with a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 31.0
Subtracting 25 from 49 leaves us with 24.
Fetch the next digit (0) from the dividend, attach it to 24 and continue: 240 / 25

Moving on to step 4:
25 goes into 240 9 times with a remainder of 15.
The next digit of our result is 9. 
Result so far: 319.0
The remainder is 15 after subtracting 225 from 240.
Take the next digit (2) from the dividend and append it to 15, then repeat: 152 / 25

Advancing to step 5:
25 goes into 152 6 times with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 3196.0
Subtract 150 from 152 to get 2.
Grab the next digit (6) from the dividend, add it to 2, then carry on: 26 / 25

Step 6:
When dividing 26 by 25, we get 1 with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 31961.0
If we take 25 away from 26, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 25

Advancing to step 7:
18 divided by 25 is 0 with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 319610.0
If we take 0 away from 18, we end up with 18.
Include the next digit (6) from the dividend after 18, then repeat: 186 / 25

Step 8:
When dividing 186 by 25, we get 7 with a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 3196107.0
Deduct 175 from 186 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 9:
When dividing 110 by 25, we get 4 with a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 3196107.4
If we take 100 away from 110, 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.

Advancing to step 10:
If we divide 100 by 25, we get 4 and a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 3196107.44
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 result is 3196107.44 with a remainder of 0.0.