Let's divide 86645830 by 170
Our goal is to divide 86645830 by 170.

Going ahead to step 1:
If we divide 8 by 170, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 170

Advancing to step 2:
170 can be fit into 86 0 times, resulting in a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Include the next digit (6) from the dividend after 86, then repeat: 866 / 170

Advancing to step 3:
170 goes into 866 5 times with a remainder of 16.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 16 after subtracting 850 from 866.
Fetch the next digit (4) from the dividend, attach it to 16 and continue: 164 / 170

Step 4:
170 goes into 164 0 times with a remainder of 164.
Write down 0 as next digit of the result. 
Result so far: 50.0
If we subtract 0 from 164, we get 164.
Grab the next digit (5) from the dividend, add it to 164, then carry on: 1645 / 170

Going ahead to step 5:
When dividing 1645 by 170, we get 9 with a remainder of 115.
Write down 9 as next digit of the result. 
Result so far: 509.0
Deduct 1530 from 1645 and we're left with 115.
Append the next digit (8) from the dividend to 115 and continue with: 1158 / 170

Step 6:
170 can be fit into 1158 6 times, resulting in a remainder of 138.
The number 6 becomes the next digit in our result. 
Result so far: 5096.0
Subtract 1020 from 1158 to get 138.
Take the next digit (3) from the dividend and append it to 138, then repeat: 1383 / 170

Let's proceed to step 7:
The number 170 fits into 1383 8 times, leaving a remainder of 23.
The next digit of our result is 8. 
Result so far: 50968.0
If we take 1360 away from 1383, we end up with 23.
Fetch the next digit (0) from the dividend, attach it to 23 and continue: 230 / 170

Let's proceed to step 8:
170 can be fit into 230 1 times, resulting in a remainder of 60.
Put 1 as the next digit of the answer. 
Result so far: 509681.0
The remainder is 60 after subtracting 170 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
If we divide 600 by 170, we get 3 and a remainder of 90.
The next digit of our result is 3. 
Result so far: 509681.3
Deduct 510 from 600 and we're left with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 10:
170 goes into 900 5 times with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 509681.35
Subtracting 850 from 900 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 11:
170 goes into 500 2 times with a remainder of 160.
Record the quotient 2 as the next digit in the result. 
Result so far: 509681.352
Subtracting 340 from 500 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 12:
When dividing 1600 by 170, we get 9 with a remainder of 70.
The number 9 becomes the next digit in our result. 
Result so far: 509681.3529
If we take 1530 away from 1600, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 13:
700 divided by 170 is 4 with a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 509681.35294
If we subtract 680 from 700, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 14:
170 can be fit into 200 1 times, resulting in a remainder of 30.
The next digit of our result is 1. 
Result so far: 509681.352941
The remainder is 30 after subtracting 170 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 15:
300 divided by 170 is 1 with a remainder of 130.
Put 1 as the next digit of the answer. 
Result so far: 509681.3529411
Subtracting 170 from 300 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

The final result is 509681.3529411 with a remainder of 1.3e-06.