Let's divide 78915789 by 825
We want to divide 78915789 by 825.

Advancing to step 1:
825 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 825

Let's proceed to step 2:
78 divided by 825 is 0 with a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Fetch the next digit (9) from the dividend, attach it to 78 and continue: 789 / 825

Going ahead to step 3:
The number 825 fits into 789 0 times, leaving a remainder of 789.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 789 to get 789.
Append the next digit (1) from the dividend to 789 and continue with: 7891 / 825

Let's proceed to step 4:
825 goes into 7891 9 times with a remainder of 466.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 7425 away from 7891, we end up with 466.
Bring next digit (5) of the dividend behind the 466 and repeat the process: 4665 / 825

Moving on to step 5:
The number 825 fits into 4665 5 times, leaving a remainder of 540.
Use 5 as the next digit of our solution. 
Result so far: 95.0
If we take 4125 away from 4665, we end up with 540.
Grab the next digit (7) from the dividend, add it to 540, then carry on: 5407 / 825

Let's proceed to step 6:
825 can be fit into 5407 6 times, resulting in a remainder of 457.
Write down 6 as next digit of the result. 
Result so far: 956.0
The remainder is 457 after subtracting 4950 from 5407.
Append the next digit (8) from the dividend to 457 and continue with: 4578 / 825

Step 7:
4578 divided by 825 is 5 with a remainder of 453.
Put 5 as the next digit of the answer. 
Result so far: 9565.0
Subtract 4125 from 4578 to get 453.
Append the next digit (9) from the dividend to 453 and continue with: 4539 / 825

Going ahead to step 8:
825 goes into 4539 5 times with a remainder of 414.
Record the quotient 5 as the next digit in the result. 
Result so far: 95655.0
Subtract 4125 from 4539 to get 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

Step 9:
825 goes into 4140 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 95655.5
If we subtract 4125 from 4140, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 10:
825 goes into 150 0 times with a remainder of 150.
The number 0 becomes the next digit in our result. 
Result so far: 95655.5
Subtract 0 from 150 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 11:
If we divide 1500 by 825, we get 1 and a remainder of 675.
Put 1 as the next digit of the answer. 
Result so far: 95655.501
Subtracting 825 from 1500 leaves us with 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Let's proceed to step 12:
When dividing 6750 by 825, we get 8 with a remainder of 150.
The next digit of our result is 8. 
Result so far: 95655.5018
Deduct 6600 from 6750 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 13:
When dividing 1500 by 825, we get 1 with a remainder of 675.
Write down 1 as next digit of the result. 
Result so far: 95655.50181
If we subtract 825 from 1500, we get 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Going ahead to step 14:
The number 825 fits into 6750 8 times, leaving a remainder of 150.
Put 8 as the next digit of the answer. 
Result so far: 95655.501818
Deduct 6600 from 6750 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Moving on to step 15:
When dividing 1500 by 825, we get 1 with a remainder of 675.
Write down 1 as next digit of the result. 
Result so far: 95655.5018181
Deduct 825 from 1500 and we're left with 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Moving on to step 16:
825 goes into 6750 8 times with a remainder of 150.
The next digit of our result is 8. 
Result so far: 95655.50181818
Deduct 6600 from 6750 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

The final outcome is 95655.50181818, with a leftover of 1.5e-07.