We look at the division of 873459 by 86 
We want to figure out the number of times 873459 can be divided by 86.

Let's proceed to step 1:
The number 86 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 86

Let's proceed to step 2:
86 can be fit into 87 1 times, resulting in a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 86 from 87, we get 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 86

Moving on to step 3:
The number 86 fits into 13 0 times, leaving a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Deduct 0 from 13 and we're left with 13.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 86

Moving on to step 4:
The number 86 fits into 134 1 times, leaving a remainder of 48.
Use 1 as the next digit of our solution. 
Result so far: 101.0
Deduct 86 from 134 and we're left with 48.
Bring next digit (5) of the dividend behind the 48 and repeat the process: 485 / 86

Let's proceed to step 5:
If we divide 485 by 86, we get 5 and a remainder of 55.
The next digit of our result is 5. 
Result so far: 1015.0
If we subtract 430 from 485, we get 55.
Grab the next digit (9) from the dividend, add it to 55, then carry on: 559 / 86

Going ahead to step 6:
When dividing 559 by 86, we get 6 with a remainder of 43.
Put 6 as the next digit of the answer. 
Result so far: 10156.0
Subtracting 516 from 559 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 7:
86 can be fit into 430 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 10156.5
If we take 430 away from 430, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
86 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10156.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
The number 86 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10156.5
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 10156.5 and a remainder of 0.0.