Let's divide 78703891 by 25
We want to divide 78703891 by 25.

Step 1:
7 divided by 25 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 25

Step 2:
25 can be fit into 78 3 times, resulting in a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 75 from 78 leaves us with 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 25

Let's proceed to step 3:
25 can be fit into 37 1 times, resulting in a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 31.0
Subtracting 25 from 37 leaves us with 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 25

On to step 4:
When dividing 120 by 25, we get 4 with a remainder of 20.
The number 4 becomes the next digit in our result. 
Result so far: 314.0
If we take 100 away from 120, we end up with 20.
Grab the next digit (3) from the dividend, add it to 20, then carry on: 203 / 25

Moving on to step 5:
When dividing 203 by 25, we get 8 with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 3148.0
If we take 200 away from 203, we end up with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 25

Advancing to step 6:
When dividing 38 by 25, we get 1 with a remainder of 13.
The next digit of our result is 1. 
Result so far: 31481.0
If we take 25 away from 38, we end up with 13.
Bring next digit (9) of the dividend behind the 13 and repeat the process: 139 / 25

On to step 7:
25 goes into 139 5 times with a remainder of 14.
The next digit of our result is 5. 
Result so far: 314815.0
Subtract 125 from 139 to get 14.
Append the next digit (1) from the dividend to 14 and continue with: 141 / 25

Advancing to step 8:
If we divide 141 by 25, we get 5 and a remainder of 16.
Put 5 as the next digit of the answer. 
Result so far: 3148155.0
Subtract 125 from 141 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 9:
25 can be fit into 160 6 times, resulting in a remainder of 10.
The next digit of our result is 6. 
Result so far: 3148155.6
Deduct 150 from 160 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.

Moving on to step 10:
25 goes into 100 4 times with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 3148155.64
Subtracting 100 from 100 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.

Going ahead to step 11:
0 divided by 25 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3148155.64
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.

Let's proceed to step 12:
If we divide 0 by 25, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3148155.64
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.

The final result is 3148155.64 with a remainder of 0.0.