We're dividing 15309521 by 166 
We want to divide 15309521 by 166.

On to step 1:
1 divided by 166 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 166

Advancing to step 2:
15 divided by 166 is 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 166

Step 3:
153 divided by 166 is 0 with a remainder of 153.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 153 leaves us with 153.
Take the next digit (0) from the dividend and append it to 153, then repeat: 1530 / 166

Advancing to step 4:
If we divide 1530 by 166, we get 9 and a remainder of 36.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 1494 away from 1530, we end up with 36.
Bring next digit (9) of the dividend behind the 36 and repeat the process: 369 / 166

Let's proceed to step 5:
166 can be fit into 369 2 times, resulting in a remainder of 37.
The number 2 becomes the next digit in our result. 
Result so far: 92.0
If we subtract 332 from 369, we get 37.
Take the next digit (5) from the dividend and append it to 37, then repeat: 375 / 166

Going ahead to step 6:
166 can be fit into 375 2 times, resulting in a remainder of 43.
Put 2 as the next digit of the answer. 
Result so far: 922.0
If we subtract 332 from 375, we get 43.
Fetch the next digit (2) from the dividend, attach it to 43 and continue: 432 / 166

Let's proceed to step 7:
If we divide 432 by 166, we get 2 and a remainder of 100.
Record the quotient 2 as the next digit in the result. 
Result so far: 9222.0
If we take 332 away from 432, we end up with 100.
Grab the next digit (1) from the dividend, add it to 100, then carry on: 1001 / 166

Advancing to step 8:
166 can be fit into 1001 6 times, resulting in a remainder of 5.
The number 6 becomes the next digit in our result. 
Result so far: 92226.0
If we subtract 996 from 1001, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
If we divide 50 by 166, we get 0 and a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 92226.0
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 10:
166 goes into 500 3 times with a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 92226.03
Subtracting 498 from 500 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 11:
The number 166 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 92226.03
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
When dividing 200 by 166, we get 1 with a remainder of 34.
Write down 1 as next digit of the result. 
Result so far: 92226.0301
Deduct 166 from 200 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 13:
166 can be fit into 340 2 times, resulting in a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 92226.03012
Subtract 332 from 340 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 14:
When dividing 80 by 166, we get 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 92226.03012
If we subtract 0 from 80, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 15:
When dividing 800 by 166, we get 4 with a remainder of 136.
Put 4 as the next digit of the answer. 
Result so far: 92226.0301204
If we subtract 664 from 800, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 16:
If we divide 1360 by 166, we get 8 and a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 92226.03012048
Deduct 1328 from 1360 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

In conclusion, the division gives 92226.03012048 with a balance of 3.2e-08.