We're dividing 6686085 by 129 
Let's see how many times 129 fits into 6686085.

Step 1:
129 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 129

Step 2:
If we divide 66 by 129, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Bring next digit (8) of the dividend behind the 66 and repeat the process: 668 / 129

Let's proceed to step 3:
If we divide 668 by 129, we get 5 and a remainder of 23.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Deduct 645 from 668 and we're left with 23.
Fetch the next digit (6) from the dividend, attach it to 23 and continue: 236 / 129

Going ahead to step 4:
The number 129 fits into 236 1 times, leaving a remainder of 107.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
If we take 129 away from 236, we end up with 107.
Append the next digit (0) from the dividend to 107 and continue with: 1070 / 129

Advancing to step 5:
1070 divided by 129 is 8 with a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 518.0
The remainder is 38 after subtracting 1032 from 1070.
Grab the next digit (8) from the dividend, add it to 38, then carry on: 388 / 129

Going ahead to step 6:
129 can be fit into 388 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 5183.0
Subtract 387 from 388 to get 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 129

Going ahead to step 7:
If we divide 15 by 129, we get 0 and a remainder of 15.
The next digit of our result is 0. 
Result so far: 51830.0
If we take 0 away from 15, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 8:
150 divided by 129 is 1 with a remainder of 21.
The next digit of our result is 1. 
Result so far: 51830.1
Subtracting 129 from 150 leaves us 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.

Let's proceed to step 9:
129 can be fit into 210 1 times, resulting in a remainder of 81.
The next digit of our result is 1. 
Result so far: 51830.11
If we subtract 129 from 210, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Our division results in 51830.11 with a remaining 0.081.