We're dividing 917661 by 21 
We want to figure out the number of times 917661 can be divided by 21.

Let's proceed to step 1:
The number 21 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 21

Moving on to step 2:
When dividing 91 by 21, we get 4 with a remainder of 7.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 84 from 91, we get 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 21

Going ahead to step 3:
When dividing 77 by 21, we get 3 with a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
If we take 63 away from 77, we end up with 14.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 21

Step 4:
21 can be fit into 146 6 times, resulting in a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 436.0
Subtracting 126 from 146 leaves us with 20.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 21

Let's proceed to step 5:
The number 21 fits into 206 9 times, leaving a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 4369.0
Deduct 189 from 206 and we're left with 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 21

Let's proceed to step 6:
21 goes into 171 8 times with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 43698.0
If we take 168 away from 171, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 43698.1
Deduct 21 from 30 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 8:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 43698.14
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 9:
The number 21 fits into 60 2 times, leaving a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 43698.142
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 10:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 43698.1428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 11:
21 goes into 120 5 times with a remainder of 15.
The next digit of our result is 5. 
Result so far: 43698.14285
If we take 105 away from 120, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 12:
If we divide 150 by 21, we get 7 and a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 43698.142857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 13:
When dividing 30 by 21, we get 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 43698.1428571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 14:
90 divided by 21 is 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 43698.14285714
Subtracting 84 from 90 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

After the division, we end up with 43698.14285714 and a remainder of 6e-09.