87879517 ÷ 25 
Let's see how many times 25 fits into 87879517.

Let's proceed to step 1:
8 divided by 25 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 25

Advancing to step 2:
The number 25 fits into 87 3 times, leaving a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 12 after subtracting 75 from 87.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 25

Moving on to step 3:
When dividing 128 by 25, we get 5 with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 35.0
Subtracting 125 from 128 leaves us with 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 25

On to step 4:
If we divide 37 by 25, we get 1 and a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 351.0
If we take 25 away from 37, we end up with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 25

Advancing to step 5:
25 can be fit into 129 5 times, resulting in a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 3515.0
The remainder is 4 after subtracting 125 from 129.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 25

Moving on to step 6:
The number 25 fits into 45 1 times, leaving a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 35151.0
If we subtract 25 from 45, we get 20.
Include the next digit (1) from the dividend after 20, then repeat: 201 / 25

Advancing to step 7:
The number 25 fits into 201 8 times, leaving a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 351518.0
Deduct 200 from 201 and we're left with 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 25

Step 8:
25 can be fit into 17 0 times, resulting in a remainder of 17.
Use 0 as the next digit of our solution. 
Result so far: 3515180.0
If we take 0 away from 17, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 9:
The number 25 fits into 170 6 times, leaving a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 3515180.6
Subtracting 150 from 170 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
200 divided by 25 is 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 3515180.68
If we take 200 away from 200, 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.

Let's proceed to step 11:
25 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 3515180.68
Subtracting 0 from 0 leaves us 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.

On to step 12:
25 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3515180.68
Subtracting 0 from 0 leaves us 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.

Our division results in 3515180.68 with a remaining 0.0.