91973501 ÷ 166 
We want to figure out the number of times 91973501 can be divided by 166.

Advancing to step 1:
The number 166 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 166

Going ahead to step 2:
166 can be fit into 91 0 times, resulting in a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Grab the next digit (9) from the dividend, add it to 91, then carry on: 919 / 166

Advancing to step 3:
If we divide 919 by 166, we get 5 and a remainder of 89.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 830 from 919 leaves us with 89.
Include the next digit (7) from the dividend after 89, then repeat: 897 / 166

Step 4:
166 can be fit into 897 5 times, resulting in a remainder of 67.
Write down 5 as next digit of the result. 
Result so far: 55.0
Subtract 830 from 897 to get 67.
Fetch the next digit (3) from the dividend, attach it to 67 and continue: 673 / 166

On to step 5:
If we divide 673 by 166, we get 4 and a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 554.0
Subtracting 664 from 673 leaves us with 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 166

Let's proceed to step 6:
The number 166 fits into 95 0 times, leaving a remainder of 95.
Record the quotient 0 as the next digit in the result. 
Result so far: 5540.0
Subtract 0 from 95 to get 95.
Grab the next digit (0) from the dividend, add it to 95, then carry on: 950 / 166

Moving on to step 7:
166 goes into 950 5 times with a remainder of 120.
The next digit of our result is 5. 
Result so far: 55405.0
Subtracting 830 from 950 leaves us with 120.
Bring next digit (1) of the dividend behind the 120 and repeat the process: 1201 / 166

Step 8:
If we divide 1201 by 166, we get 7 and a remainder of 39.
Use 7 as the next digit of our solution. 
Result so far: 554057.0
Subtracting 1162 from 1201 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 9:
166 goes into 390 2 times with a remainder of 58.
The next digit of our result is 2. 
Result so far: 554057.2
Subtract 332 from 390 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 10:
580 divided by 166 is 3 with a remainder of 82.
Use 3 as the next digit of our solution. 
Result so far: 554057.23
The remainder is 82 after subtracting 498 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 11:
166 goes into 820 4 times with a remainder of 156.
The number 4 becomes the next digit in our result. 
Result so far: 554057.234
If we take 664 away from 820, we end up with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

On to step 12:
166 can be fit into 1560 9 times, resulting in a remainder of 66.
The next digit of our result is 9. 
Result so far: 554057.2349
If we take 1494 away from 1560, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 13:
166 goes into 660 3 times with a remainder of 162.
Put 3 as the next digit of the answer. 
Result so far: 554057.23493
Subtracting 498 from 660 leaves us with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Step 14:
166 can be fit into 1620 9 times, resulting in a remainder of 126.
Put 9 as the next digit of the answer. 
Result so far: 554057.234939
Deduct 1494 from 1620 and we're left with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

On to step 15:
1260 divided by 166 is 7 with a remainder of 98.
Record the quotient 7 as the next digit in the result. 
Result so far: 554057.2349397
The remainder is 98 after subtracting 1162 from 1260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Let's proceed to step 16:
166 can be fit into 980 5 times, resulting in a remainder of 150.
The next digit of our result is 5. 
Result so far: 554057.23493975
The remainder is 150 after subtracting 830 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

The quotient of the division is 554057.23493975, and the remainder is 1.5e-07.