We look at the division of 78859 by 87 
We're looking to find how many times 87 goes into 78859.

Advancing to step 1:
87 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 87

On to step 2:
87 can be fit into 78 0 times, resulting in 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.
Grab the next digit (8) from the dividend, add it to 78, then carry on: 788 / 87

Moving on to step 3:
If we divide 788 by 87, we get 9 and a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 783 from 788 and we're left with 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 87

Let's proceed to step 4:
87 goes into 55 0 times with a remainder of 55.
Put 0 as the next digit of the answer. 
Result so far: 90.0
The remainder is 55 after subtracting 0 from 55.
Grab the next digit (9) from the dividend, add it to 55, then carry on: 559 / 87

Moving on to step 5:
87 can be fit into 559 6 times, resulting in a remainder of 37.
Use 6 as the next digit of our solution. 
Result so far: 906.0
If we take 522 away from 559, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 6:
370 divided by 87 is 4 with a remainder of 22.
The number 4 becomes the next digit in our result. 
Result so far: 906.4
Subtracting 348 from 370 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 7:
When dividing 220 by 87, we get 2 with a remainder of 46.
Write down 2 as next digit of the result. 
Result so far: 906.42
Subtracting 174 from 220 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 8:
The number 87 fits into 460 5 times, leaving a remainder of 25.
The next digit of our result is 5. 
Result so far: 906.425
Subtracting 435 from 460 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 9:
If we divide 250 by 87, we get 2 and a remainder of 76.
Use 2 as the next digit of our solution. 
Result so far: 906.4252
If we subtract 174 from 250, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 10:
87 can be fit into 760 8 times, resulting in a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 906.42528
Subtracting 696 from 760 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 11:
If we divide 640 by 87, we get 7 and a remainder of 31.
Use 7 as the next digit of our solution. 
Result so far: 906.425287
Subtracting 609 from 640 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Let's proceed to step 12:
310 divided by 87 is 3 with a remainder of 49.
The number 3 becomes the next digit in our result. 
Result so far: 906.4252873
Subtract 261 from 310 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 13:
The number 87 fits into 490 5 times, leaving a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 906.42528735
Deduct 435 from 490 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

The final outcome is 906.42528735, with a leftover of 5.5e-08.