170043 divided by 86 
Our goal is to divide 170043 by 86.

Advancing to step 1:
86 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 86

Advancing to step 2:
When dividing 17 by 86, we get 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 17 leaves us with 17.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 86

Step 3:
170 divided by 86 is 1 with a remainder of 84.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 84 after subtracting 86 from 170.
Include the next digit (0) from the dividend after 84, then repeat: 840 / 86

Step 4:
The number 86 fits into 840 9 times, leaving a remainder of 66.
The next digit of our result is 9. 
Result so far: 19.0
If we take 774 away from 840, we end up with 66.
Include the next digit (4) from the dividend after 66, then repeat: 664 / 86

Advancing to step 5:
86 can be fit into 664 7 times, resulting in a remainder of 62.
Put 7 as the next digit of the answer. 
Result so far: 197.0
Subtract 602 from 664 to get 62.
Grab the next digit (3) from the dividend, add it to 62, then carry on: 623 / 86

On to step 6:
86 can be fit into 623 7 times, resulting in a remainder of 21.
The next digit of our result is 7. 
Result so far: 1977.0
Deduct 602 from 623 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
86 goes into 210 2 times with a remainder of 38.
The next digit of our result is 2. 
Result so far: 1977.2
Subtract 172 from 210 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 8:
86 goes into 380 4 times with a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 1977.24
If we take 344 away from 380, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 9:
360 divided by 86 is 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 1977.244
Subtracting 344 from 360 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 1977.244 with a remaining 0.0016.