6651906 ÷ 129 
We want to divide 6651906 by 129.

Moving on to step 1:
When dividing 6 by 129, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 129

Moving on to step 2:
When dividing 66 by 129, we get 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Fetch the next digit (5) from the dividend, attach it to 66 and continue: 665 / 129

Going ahead to step 3:
When dividing 665 by 129, we get 5 with a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtract 645 from 665 to get 20.
Include the next digit (1) from the dividend after 20, then repeat: 201 / 129

Advancing to step 4:
The number 129 fits into 201 1 times, leaving a remainder of 72.
Use 1 as the next digit of our solution. 
Result so far: 51.0
Deduct 129 from 201 and we're left with 72.
Fetch the next digit (9) from the dividend, attach it to 72 and continue: 729 / 129

Step 5:
729 divided by 129 is 5 with a remainder of 84.
Put 5 as the next digit of the answer. 
Result so far: 515.0
Subtracting 645 from 729 leaves us with 84.
Grab the next digit (0) from the dividend, add it to 84, then carry on: 840 / 129

Let's proceed to step 6:
When dividing 840 by 129, we get 6 with a remainder of 66.
Put 6 as the next digit of the answer. 
Result so far: 5156.0
Subtract 774 from 840 to get 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 129

Moving on to step 7:
If we divide 666 by 129, we get 5 and a remainder of 21.
The next digit of our result is 5. 
Result so far: 51565.0
Subtract 645 from 666 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 8:
When dividing 210 by 129, we get 1 with a remainder of 81.
Record the quotient 1 as the next digit in the result. 
Result so far: 51565.1
Deduct 129 from 210 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Advancing to step 9:
810 divided by 129 is 6 with a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 51565.16
Subtract 774 from 810 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 10:
129 can be fit into 360 2 times, resulting in a remainder of 102.
Use 2 as the next digit of our solution. 
Result so far: 51565.162
Deduct 258 from 360 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Going ahead to step 11:
129 goes into 1020 7 times with a remainder of 117.
Put 7 as the next digit of the answer. 
Result so far: 51565.1627
If we subtract 903 from 1020, we get 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Moving on to step 12:
129 goes into 1170 9 times with a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 51565.16279
Subtracting 1161 from 1170 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 13:
If we divide 90 by 129, we get 0 and a remainder of 90.
The next digit of our result is 0. 
Result so far: 51565.16279
Subtract 0 from 90 to get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 14:
The number 129 fits into 900 6 times, leaving a remainder of 126.
The number 6 becomes the next digit in our result. 
Result so far: 51565.1627906
Subtract 774 from 900 to get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Let's proceed to step 15:
129 goes into 1260 9 times with a remainder of 99.
Use 9 as the next digit of our solution. 
Result so far: 51565.16279069
The remainder is 99 after subtracting 1161 from 1260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

The final outcome is 51565.16279069, with a leftover of 9.9e-08.