We look at the division of 72869839 by 166 
We're looking to find how many times 166 goes into 72869839.

Step 1:
If we divide 7 by 166, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 166

Let's proceed to step 2:
166 can be fit into 72 0 times, resulting in a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 72, we get 72.
Include the next digit (8) from the dividend after 72, then repeat: 728 / 166

Moving on to step 3:
166 goes into 728 4 times with a remainder of 64.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 664 from 728 to get 64.
Append the next digit (6) from the dividend to 64 and continue with: 646 / 166

Moving on to step 4:
166 can be fit into 646 3 times, resulting in a remainder of 148.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Subtracting 498 from 646 leaves us with 148.
Fetch the next digit (9) from the dividend, attach it to 148 and continue: 1489 / 166

Advancing to step 5:
166 goes into 1489 8 times with a remainder of 161.
The number 8 becomes the next digit in our result. 
Result so far: 438.0
Subtracting 1328 from 1489 leaves us with 161.
Grab the next digit (8) from the dividend, add it to 161, then carry on: 1618 / 166

Advancing to step 6:
The number 166 fits into 1618 9 times, leaving a remainder of 124.
Use 9 as the next digit of our solution. 
Result so far: 4389.0
The remainder is 124 after subtracting 1494 from 1618.
Include the next digit (3) from the dividend after 124, then repeat: 1243 / 166

On to step 7:
The number 166 fits into 1243 7 times, leaving a remainder of 81.
Use 7 as the next digit of our solution. 
Result so far: 43897.0
If we subtract 1162 from 1243, we get 81.
Bring next digit (9) of the dividend behind the 81 and repeat the process: 819 / 166

Going ahead to step 8:
166 goes into 819 4 times with a remainder of 155.
Put 4 as the next digit of the answer. 
Result so far: 438974.0
Subtract 664 from 819 to get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Let's proceed to step 9:
If we divide 1550 by 166, we get 9 and a remainder of 56.
The next digit of our result is 9. 
Result so far: 438974.9
If we take 1494 away from 1550, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 10:
If we divide 560 by 166, we get 3 and a remainder of 62.
Record the quotient 3 as the next digit in the result. 
Result so far: 438974.93
The remainder is 62 after subtracting 498 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 11:
The number 166 fits into 620 3 times, leaving a remainder of 122.
Write down 3 as next digit of the result. 
Result so far: 438974.933
Subtract 498 from 620 to get 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

In conclusion, the division gives 438974.933 with a balance of 0.0122.