Let's divide 918666 by 21
Let's see how many times 21 fits into 918666.

Advancing to step 1:
21 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 21

On to step 2:
21 can be fit into 91 4 times, resulting in a remainder of 7.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 84 from 91 leaves us with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 21

Moving on to step 3:
21 goes into 78 3 times with a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 43.0
If we subtract 63 from 78, we get 15.
Append the next digit (6) from the dividend to 15 and continue with: 156 / 21

On to step 4:
The number 21 fits into 156 7 times, leaving a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 437.0
Subtracting 147 from 156 leaves us with 9.
Include the next digit (6) from the dividend after 9, then repeat: 96 / 21

Going ahead to step 5:
21 can be fit into 96 4 times, resulting in a remainder of 12.
The next digit of our result is 4. 
Result so far: 4374.0
Subtract 84 from 96 to get 12.
Fetch the next digit (6) from the dividend, attach it to 12 and continue: 126 / 21

Advancing to step 6:
When dividing 126 by 21, we get 6 with a remainder of 0.
The next digit of our result is 6. 
Result so far: 43746.0
If we take 126 away from 126, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
21 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 43746.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
21 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 43746.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 43746.0 with a remaining 0.0.