We're dividing 19921256 by 166 
Our goal is to divide 19921256 by 166.

Moving on to step 1:
If we divide 1 by 166, we get 0 and 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.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 166

On to step 2:
166 can be fit into 19 0 times, resulting in a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 19 and we're left with 19.
Grab the next digit (9) from the dividend, add it to 19, then carry on: 199 / 166

Moving on to step 3:
199 divided by 166 is 1 with a remainder of 33.
The next digit of our result is 1. 
Result so far: 1.0
If we take 166 away from 199, we end up with 33.
Include the next digit (2) from the dividend after 33, then repeat: 332 / 166

On to step 4:
332 divided by 166 is 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we take 332 away from 332, we end up with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 166

Going ahead to step 5:
166 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 120.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 166

Step 6:
12 divided by 166 is 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 1200.0
Subtracting 0 from 12 leaves us with 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 166

Step 7:
When dividing 125 by 166, we get 0 with a remainder of 125.
Use 0 as the next digit of our solution. 
Result so far: 12000.0
Deduct 0 from 125 and we're left with 125.
Append the next digit (6) from the dividend to 125 and continue with: 1256 / 166

On to step 8:
The number 166 fits into 1256 7 times, leaving a remainder of 94.
The next digit of our result is 7. 
Result so far: 120007.0
Subtract 1162 from 1256 to get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Going ahead to step 9:
166 goes into 940 5 times with a remainder of 110.
The next digit of our result is 5. 
Result so far: 120007.5
If we subtract 830 from 940, we get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 10:
When dividing 1100 by 166, we get 6 with a remainder of 104.
Write down 6 as next digit of the result. 
Result so far: 120007.56
Subtracting 996 from 1100 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Moving on to step 11:
1040 divided by 166 is 6 with a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 120007.566
If we subtract 996 from 1040, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The quotient of the division is 120007.566, and the remainder is 0.0044.