We divide 916989 by 21
Our goal is to divide 916989 by 21.

Moving on to step 1:
If we divide 9 by 21, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 21

Advancing to step 2:
91 divided by 21 is 4 with a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 84 from 91 to get 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 21

Going ahead to step 3:
The number 21 fits into 76 3 times, leaving a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Subtract 63 from 76 to get 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 21

Let's proceed to step 4:
139 divided by 21 is 6 with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 436.0
If we take 126 away from 139, we end up with 13.
Append the next digit (8) from the dividend to 13 and continue with: 138 / 21

Let's proceed to step 5:
21 can be fit into 138 6 times, resulting in a remainder of 12.
The next digit of our result is 6. 
Result so far: 4366.0
Subtracting 126 from 138 leaves us with 12.
Bring next digit (9) of the dividend behind the 12 and repeat the process: 129 / 21

Moving on to step 6:
If we divide 129 by 21, we get 6 and a remainder of 3.
The number 6 becomes the next digit in our result. 
Result so far: 43666.0
Deduct 126 from 129 and we're left 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 7:
30 divided by 21 is 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 43666.1
If we take 21 away from 30, we end up 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.

Going ahead to step 8:
90 divided by 21 is 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 43666.14
The remainder is 6 after subtracting 84 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 9:
21 can be fit into 60 2 times, resulting in a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 43666.142
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
21 goes into 180 8 times with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 43666.1428
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.

Advancing to step 11:
120 divided by 21 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 43666.14285
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:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 43666.142857
Subtract 147 from 150 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 13:
The number 21 fits into 30 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 43666.1428571
Subtracting 21 from 30 leaves us 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 14:
90 divided by 21 is 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 43666.14285714
Deduct 84 from 90 and we're left 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.

In conclusion, the division gives 43666.14285714 with a balance of 6e-09.