19981843 ÷ 668 
We want to figure out the number of times 19981843 can be divided by 668.

Let's proceed to step 1:
1 divided by 668 is 0 with 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 (9) from the dividend to 1 and continue with: 19 / 668

Advancing to step 2:
19 divided by 668 is 0 with a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 19 to get 19.
Include the next digit (9) from the dividend after 19, then repeat: 199 / 668

Going ahead to step 3:
If we divide 199 by 668, we get 0 and a remainder of 199.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 199, we get 199.
Grab the next digit (8) from the dividend, add it to 199, then carry on: 1998 / 668

Step 4:
The number 668 fits into 1998 2 times, leaving a remainder of 662.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 662 after subtracting 1336 from 1998.
Bring next digit (1) of the dividend behind the 662 and repeat the process: 6621 / 668

Step 5:
6621 divided by 668 is 9 with a remainder of 609.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
Deduct 6012 from 6621 and we're left with 609.
Append the next digit (8) from the dividend to 609 and continue with: 6098 / 668

Step 6:
The number 668 fits into 6098 9 times, leaving a remainder of 86.
Use 9 as the next digit of our solution. 
Result so far: 299.0
If we subtract 6012 from 6098, we get 86.
Grab the next digit (4) from the dividend, add it to 86, then carry on: 864 / 668

Moving on to step 7:
668 can be fit into 864 1 times, resulting in a remainder of 196.
Write down 1 as next digit of the result. 
Result so far: 2991.0
Subtract 668 from 864 to get 196.
Grab the next digit (3) from the dividend, add it to 196, then carry on: 1963 / 668

On to step 8:
668 goes into 1963 2 times with a remainder of 627.
Use 2 as the next digit of our solution. 
Result so far: 29912.0
Subtract 1336 from 1963 to get 627.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6270, and continue the process.

Let's proceed to step 9:
6270 divided by 668 is 9 with a remainder of 258.
Record the quotient 9 as the next digit in the result. 
Result so far: 29912.9
If we take 6012 away from 6270, we end up with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Advancing to step 10:
When dividing 2580 by 668, we get 3 with a remainder of 576.
Use 3 as the next digit of our solution. 
Result so far: 29912.93
Deduct 2004 from 2580 and we're left with 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Let's proceed to step 11:
5760 divided by 668 is 8 with a remainder of 416.
Put 8 as the next digit of the answer. 
Result so far: 29912.938
Subtracting 5344 from 5760 leaves us with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

On to step 12:
The number 668 fits into 4160 6 times, leaving a remainder of 152.
Put 6 as the next digit of the answer. 
Result so far: 29912.9386
Subtract 4008 from 4160 to get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Advancing to step 13:
668 goes into 1520 2 times with a remainder of 184.
The number 2 becomes the next digit in our result. 
Result so far: 29912.93862
If we subtract 1336 from 1520, we get 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Let's proceed to step 14:
668 can be fit into 1840 2 times, resulting in a remainder of 504.
The number 2 becomes the next digit in our result. 
Result so far: 29912.938622
Subtract 1336 from 1840 to get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

After the division, we end up with 29912.938622 and a remainder of 5.04e-05.