We look at the division of 15909925 by 789 
Our goal is to divide 15909925 by 789.

On to step 1:
The number 789 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 789

Going ahead to step 2:
The number 789 fits into 15 0 times, leaving a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 789

Step 3:
The number 789 fits into 159 0 times, leaving a remainder of 159.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 159 and we're left with 159.
Grab the next digit (0) from the dividend, add it to 159, then carry on: 1590 / 789

Moving on to step 4:
789 can be fit into 1590 2 times, resulting in a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 1578 away from 1590, we end up with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 789

Step 5:
If we divide 129 by 789, we get 0 and a remainder of 129.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtract 0 from 129 to get 129.
Append the next digit (9) from the dividend to 129 and continue with: 1299 / 789

Let's proceed to step 6:
789 can be fit into 1299 1 times, resulting in a remainder of 510.
Use 1 as the next digit of our solution. 
Result so far: 201.0
Deduct 789 from 1299 and we're left with 510.
Include the next digit (2) from the dividend after 510, then repeat: 5102 / 789

Advancing to step 7:
When dividing 5102 by 789, we get 6 with a remainder of 368.
Record the quotient 6 as the next digit in the result. 
Result so far: 2016.0
Subtracting 4734 from 5102 leaves us with 368.
Fetch the next digit (5) from the dividend, attach it to 368 and continue: 3685 / 789

On to step 8:
If we divide 3685 by 789, we get 4 and a remainder of 529.
The number 4 becomes the next digit in our result. 
Result so far: 20164.0
Subtract 3156 from 3685 to get 529.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5290, and continue the process.

Advancing to step 9:
The number 789 fits into 5290 6 times, leaving a remainder of 556.
Record the quotient 6 as the next digit in the result. 
Result so far: 20164.6
Deduct 4734 from 5290 and we're left with 556.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

Advancing to step 10:
5560 divided by 789 is 7 with a remainder of 37.
Record the quotient 7 as the next digit in the result. 
Result so far: 20164.67
If we subtract 5523 from 5560, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 11:
789 can be fit into 370 0 times, resulting in a remainder of 370.
The number 0 becomes the next digit in our result. 
Result so far: 20164.67
If we subtract 0 from 370, we get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Going ahead to step 12:
3700 divided by 789 is 4 with a remainder of 544.
Write down 4 as next digit of the result. 
Result so far: 20164.6704
Deduct 3156 from 3700 and we're left with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Let's proceed to step 13:
When dividing 5440 by 789, we get 6 with a remainder of 706.
The next digit of our result is 6. 
Result so far: 20164.67046
Subtract 4734 from 5440 to get 706.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7060, and continue the process.

Going ahead to step 14:
If we divide 7060 by 789, we get 8 and a remainder of 748.
Record the quotient 8 as the next digit in the result. 
Result so far: 20164.670468
The remainder is 748 after subtracting 6312 from 7060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7480, and continue the process.

On to step 15:
If we divide 7480 by 789, we get 9 and a remainder of 379.
Record the quotient 9 as the next digit in the result. 
Result so far: 20164.6704689
Deduct 7101 from 7480 and we're left with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Let's proceed to step 16:
789 goes into 3790 4 times with a remainder of 634.
The next digit of our result is 4. 
Result so far: 20164.67046894
If we take 3156 away from 3790, we end up with 634.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6340, and continue the process.

Our division results in 20164.67046894 with a remaining 6.34e-07.