We're dividing 54216201 by 166 
We want to figure out the number of times 54216201 can be divided by 166.

On to step 1:
5 divided by 166 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 166

On to step 2:
When dividing 54 by 166, we get 0 with a remainder of 54.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 54, we get 54.
Fetch the next digit (2) from the dividend, attach it to 54 and continue: 542 / 166

Advancing to step 3:
166 can be fit into 542 3 times, resulting in a remainder of 44.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 44 after subtracting 498 from 542.
Take the next digit (1) from the dividend and append it to 44, then repeat: 441 / 166

Step 4:
166 can be fit into 441 2 times, resulting in a remainder of 109.
Use 2 as the next digit of our solution. 
Result so far: 32.0
Subtract 332 from 441 to get 109.
Fetch the next digit (6) from the dividend, attach it to 109 and continue: 1096 / 166

Going ahead to step 5:
When dividing 1096 by 166, we get 6 with a remainder of 100.
The number 6 becomes the next digit in our result. 
Result so far: 326.0
Deduct 996 from 1096 and we're left with 100.
Include the next digit (2) from the dividend after 100, then repeat: 1002 / 166

Moving on to step 6:
1002 divided by 166 is 6 with a remainder of 6.
The next digit of our result is 6. 
Result so far: 3266.0
Subtract 996 from 1002 to get 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 166

Going ahead to step 7:
166 can be fit into 60 0 times, resulting in a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 32660.0
Deduct 0 from 60 and we're left with 60.
Append the next digit (1) from the dividend to 60 and continue with: 601 / 166

Moving on to step 8:
166 can be fit into 601 3 times, resulting in a remainder of 103.
Write down 3 as next digit of the result. 
Result so far: 326603.0
If we subtract 498 from 601, we get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Step 9:
If we divide 1030 by 166, we get 6 and a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 326603.6
The remainder is 34 after subtracting 996 from 1030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 10:
If we divide 340 by 166, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 326603.62
If we subtract 332 from 340, we 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.

Moving on to step 11:
166 can be fit into 80 0 times, resulting in a remainder of 80.
The next digit of our result is 0. 
Result so far: 326603.62
Subtract 0 from 80 to 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.

Moving on to step 12:
166 can be fit into 800 4 times, resulting in a remainder of 136.
The number 4 becomes the next digit in our result. 
Result so far: 326603.6204
Subtracting 664 from 800 leaves us with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 13:
When dividing 1360 by 166, we get 8 with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 326603.62048
If we take 1328 away from 1360, we end up 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.

On to step 14:
166 can be fit into 320 1 times, resulting in a remainder of 154.
Put 1 as the next digit of the answer. 
Result so far: 326603.620481
Subtracting 166 from 320 leaves us with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

On to step 15:
166 can be fit into 1540 9 times, resulting in a remainder of 46.
The number 9 becomes the next digit in our result. 
Result so far: 326603.6204819
The remainder is 46 after subtracting 1494 from 1540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 16:
If we divide 460 by 166, we get 2 and a remainder of 128.
Use 2 as the next digit of our solution. 
Result so far: 326603.62048192
If we subtract 332 from 460, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The final result is 326603.62048192 with a remainder of 1.28e-07.