We look at the division of 15905065 by 789 
We want to figure out the number of times 15905065 can be divided by 789.

Going ahead to step 1:
789 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 789

On to step 2:
15 divided by 789 is 0 with a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 789

Let's proceed to step 3:
159 divided by 789 is 0 with a remainder of 159.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 159 after subtracting 0 from 159.
Append the next digit (0) from the dividend to 159 and continue with: 1590 / 789

Going ahead to step 4:
789 can be fit into 1590 2 times, resulting in a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 1578 away from 1590, we end up with 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 789

Moving on to step 5:
When dividing 125 by 789, we get 0 with a remainder of 125.
The next digit of our result is 0. 
Result so far: 20.0
Subtract 0 from 125 to get 125.
Grab the next digit (0) from the dividend, add it to 125, then carry on: 1250 / 789

Advancing to step 6:
1250 divided by 789 is 1 with a remainder of 461.
Put 1 as the next digit of the answer. 
Result so far: 201.0
Subtracting 789 from 1250 leaves us with 461.
Take the next digit (6) from the dividend and append it to 461, then repeat: 4616 / 789

Step 7:
The number 789 fits into 4616 5 times, leaving a remainder of 671.
Write down 5 as next digit of the result. 
Result so far: 2015.0
Subtracting 3945 from 4616 leaves us with 671.
Grab the next digit (5) from the dividend, add it to 671, then carry on: 6715 / 789

Moving on to step 8:
789 goes into 6715 8 times with a remainder of 403.
Use 8 as the next digit of our solution. 
Result so far: 20158.0
If we take 6312 away from 6715, we end up with 403.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4030, and continue the process.

Going ahead to step 9:
The number 789 fits into 4030 5 times, leaving a remainder of 85.
The number 5 becomes the next digit in our result. 
Result so far: 20158.5
If we take 3945 away from 4030, we end up with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 10:
If we divide 850 by 789, we get 1 and a remainder of 61.
The next digit of our result is 1. 
Result so far: 20158.51
If we subtract 789 from 850, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 11:
610 divided by 789 is 0 with a remainder of 610.
The number 0 becomes the next digit in our result. 
Result so far: 20158.51
Subtracting 0 from 610 leaves us with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Advancing to step 12:
If we divide 6100 by 789, we get 7 and a remainder of 577.
Put 7 as the next digit of the answer. 
Result so far: 20158.5107
The remainder is 577 after subtracting 5523 from 6100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Moving on to step 13:
789 can be fit into 5770 7 times, resulting in a remainder of 247.
Use 7 as the next digit of our solution. 
Result so far: 20158.51077
Deduct 5523 from 5770 and we're left with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

The final outcome is 20158.51077, with a leftover of 0.000247.