We're dividing 23978120 by 166 
We're looking to find how many times 166 goes into 23978120.

On to step 1:
166 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 166

On to step 2:
166 can be fit into 23 0 times, resulting in a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 23, we get 23.
Include the next digit (9) from the dividend after 23, then repeat: 239 / 166

On to step 3:
When dividing 239 by 166, we get 1 with a remainder of 73.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 166 from 239, we get 73.
Take the next digit (7) from the dividend and append it to 73, then repeat: 737 / 166

On to step 4:
If we divide 737 by 166, we get 4 and a remainder of 73.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Deduct 664 from 737 and we're left with 73.
Append the next digit (8) from the dividend to 73 and continue with: 738 / 166

Step 5:
When dividing 738 by 166, we get 4 with a remainder of 74.
The next digit of our result is 4. 
Result so far: 144.0
If we subtract 664 from 738, we get 74.
Bring next digit (1) of the dividend behind the 74 and repeat the process: 741 / 166

Let's proceed to step 6:
When dividing 741 by 166, we get 4 with a remainder of 77.
The number 4 becomes the next digit in our result. 
Result so far: 1444.0
If we subtract 664 from 741, we get 77.
Append the next digit (2) from the dividend to 77 and continue with: 772 / 166

On to step 7:
166 goes into 772 4 times with a remainder of 108.
Use 4 as the next digit of our solution. 
Result so far: 14444.0
Subtract 664 from 772 to get 108.
Append the next digit (0) from the dividend to 108 and continue with: 1080 / 166

Advancing to step 8:
166 goes into 1080 6 times with a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 144446.0
If we subtract 996 from 1080, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Advancing to step 9:
When dividing 840 by 166, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 144446.5
If we take 830 away from 840, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
The number 166 fits into 100 0 times, leaving a remainder of 100.
Write down 0 as next digit of the result. 
Result so far: 144446.5
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 11:
When dividing 1000 by 166, we get 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 144446.506
Subtracting 996 from 1000 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 12:
166 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 144446.506
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 13:
400 divided by 166 is 2 with a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 144446.50602
If we take 332 away from 400, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 14:
The number 166 fits into 680 4 times, leaving a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 144446.506024
Deduct 664 from 680 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 15:
166 can be fit into 160 0 times, resulting in a remainder of 160.
The next digit of our result is 0. 
Result so far: 144446.506024
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 16:
If we divide 1600 by 166, we get 9 and a remainder of 106.
The number 9 becomes the next digit in our result. 
Result so far: 144446.50602409
Deduct 1494 from 1600 and we're left with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

The final result is 144446.50602409 with a remainder of 1.06e-07.