We look at the division of 859573 by 78 
We want to figure out the number of times 859573 can be divided by 78.

Step 1:
78 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 78

Let's proceed to step 2:
When dividing 85 by 78, we get 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 78 from 85 and we're left with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 78

On to step 3:
If we divide 79 by 78, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Deduct 78 from 79 and we're left with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 78

On to step 4:
When dividing 15 by 78, we get 0 with a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 110.0
Subtract 0 from 15 to get 15.
Include the next digit (7) from the dividend after 15, then repeat: 157 / 78

Advancing to step 5:
The number 78 fits into 157 2 times, leaving a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 1102.0
Subtracting 156 from 157 leaves us with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 78

Step 6:
The number 78 fits into 13 0 times, leaving a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 11020.0
Subtract 0 from 13 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 7:
If we divide 130 by 78, we get 1 and a remainder of 52.
The next digit of our result is 1. 
Result so far: 11020.1
Deduct 78 from 130 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 8:
78 can be fit into 520 6 times, resulting in a remainder of 52.
Write down 6 as next digit of the result. 
Result so far: 11020.16
The remainder is 52 after subtracting 468 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 9:
If we divide 520 by 78, we get 6 and a remainder of 52.
Record the quotient 6 as the next digit in the result. 
Result so far: 11020.166
Subtracting 468 from 520 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final outcome is 11020.166, with a leftover of 0.0052.