We divide 91971002 by 21
Let's see how many times 21 fits into 91971002.

Moving on to step 1:
21 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 21

Let's proceed to step 2:
21 goes into 91 4 times with a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 84 from 91, we get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 21

Moving on to step 3:
When dividing 79 by 21, we get 3 with a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 43.0
The remainder is 16 after subtracting 63 from 79.
Fetch the next digit (7) from the dividend, attach it to 16 and continue: 167 / 21

Moving on to step 4:
21 goes into 167 7 times with a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 437.0
Subtracting 147 from 167 leaves us with 20.
Append the next digit (1) from the dividend to 20 and continue with: 201 / 21

On to step 5:
The number 21 fits into 201 9 times, leaving a remainder of 12.
Use 9 as the next digit of our solution. 
Result so far: 4379.0
If we subtract 189 from 201, we get 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 21

On to step 6:
120 divided by 21 is 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 43795.0
Deduct 105 from 120 and we're left with 15.
Take the next digit (0) from the dividend and append it to 15, then repeat: 150 / 21

On to step 7:
The number 21 fits into 150 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 437957.0
Subtract 147 from 150 to get 3.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 21

Moving on to step 8:
32 divided by 21 is 1 with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 4379571.0
Deduct 21 from 32 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 9:
110 divided by 21 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 4379571.5
If we subtract 105 from 110, 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 10:
21 goes into 50 2 times with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 4379571.52
Subtracting 42 from 50 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 11:
The number 21 fits into 80 3 times, leaving a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 4379571.523
If we take 63 away from 80, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 12:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 4379571.5238
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 13:
20 divided by 21 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 4379571.5238
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 14:
21 goes into 200 9 times with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 4379571.523809
Deduct 189 from 200 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 15:
110 divided by 21 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 4379571.5238095
Subtracting 105 from 110 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 16:
If we divide 50 by 21, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 4379571.52380952
If we subtract 42 from 50, 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.

The final result is 4379571.52380952 with a remainder of 8e-09.