16991905 divided by 666 
Let's see how many times 666 fits into 16991905.

Moving on to step 1:
666 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 666

On to step 2:
If we divide 16 by 666, we get 0 and a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 16 after subtracting 0 from 16.
Fetch the next digit (9) from the dividend, attach it to 16 and continue: 169 / 666

Step 3:
666 can be fit into 169 0 times, resulting in a remainder of 169.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 169 and we're left with 169.
Fetch the next digit (9) from the dividend, attach it to 169 and continue: 1699 / 666

Going ahead to step 4:
666 can be fit into 1699 2 times, resulting in a remainder of 367.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 1332 from 1699 leaves us with 367.
Include the next digit (1) from the dividend after 367, then repeat: 3671 / 666

Going ahead to step 5:
If we divide 3671 by 666, we get 5 and a remainder of 341.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
If we take 3330 away from 3671, we end up with 341.
Include the next digit (9) from the dividend after 341, then repeat: 3419 / 666

Moving on to step 6:
The number 666 fits into 3419 5 times, leaving a remainder of 89.
Write down 5 as next digit of the result. 
Result so far: 255.0
The remainder is 89 after subtracting 3330 from 3419.
Grab the next digit (0) from the dividend, add it to 89, then carry on: 890 / 666

Going ahead to step 7:
The number 666 fits into 890 1 times, leaving a remainder of 224.
Put 1 as the next digit of the answer. 
Result so far: 2551.0
Subtracting 666 from 890 leaves us with 224.
Append the next digit (5) from the dividend to 224 and continue with: 2245 / 666

Advancing to step 8:
The number 666 fits into 2245 3 times, leaving a remainder of 247.
The number 3 becomes the next digit in our result. 
Result so far: 25513.0
If we subtract 1998 from 2245, we get 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Step 9:
When dividing 2470 by 666, we get 3 with a remainder of 472.
Put 3 as the next digit of the answer. 
Result so far: 25513.3
Subtract 1998 from 2470 to get 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Going ahead to step 10:
666 can be fit into 4720 7 times, resulting in a remainder of 58.
The next digit of our result is 7. 
Result so far: 25513.37
Deduct 4662 from 4720 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 11:
666 can be fit into 580 0 times, resulting in a remainder of 580.
Write down 0 as next digit of the result. 
Result so far: 25513.37
Subtracting 0 from 580 leaves us with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

On to step 12:
666 goes into 5800 8 times with a remainder of 472.
Put 8 as the next digit of the answer. 
Result so far: 25513.3708
If we take 5328 away from 5800, we end up with 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Step 13:
The number 666 fits into 4720 7 times, leaving a remainder of 58.
The next digit of our result is 7. 
Result so far: 25513.37087
Deduct 4662 from 4720 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 14:
When dividing 580 by 666, we get 0 with a remainder of 580.
Record the quotient 0 as the next digit in the result. 
Result so far: 25513.37087
The remainder is 580 after subtracting 0 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

On to step 15:
666 goes into 5800 8 times with a remainder of 472.
The number 8 becomes the next digit in our result. 
Result so far: 25513.3708708
Deduct 5328 from 5800 and we're left with 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Step 16:
666 goes into 4720 7 times with a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 25513.37087087
If we subtract 4662 from 4720, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

The final result is 25513.37087087 with a remainder of 5.8e-08.