981620 ÷ 21 
Let's see how many times 21 fits into 981620.

On to step 1:
If we divide 9 by 21, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 21

Advancing to step 2:
When dividing 98 by 21, we get 4 with a remainder of 14.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 14 after subtracting 84 from 98.
Include the next digit (1) from the dividend after 14, then repeat: 141 / 21

On to step 3:
The number 21 fits into 141 6 times, leaving a remainder of 15.
Write down 6 as next digit of the result. 
Result so far: 46.0
Deduct 126 from 141 and we're left with 15.
Include the next digit (6) from the dividend after 15, then repeat: 156 / 21

Moving on to step 4:
21 can be fit into 156 7 times, resulting in a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 467.0
The remainder is 9 after subtracting 147 from 156.
Append the next digit (2) from the dividend to 9 and continue with: 92 / 21

Advancing to step 5:
21 can be fit into 92 4 times, resulting in a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 4674.0
Deduct 84 from 92 and we're left with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 21

Let's proceed to step 6:
80 divided by 21 is 3 with a remainder of 17.
The next digit of our result is 3. 
Result so far: 46743.0
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The next digit of our result is 8. 
Result so far: 46743.8
Subtracting 168 from 170 leaves us with 2.
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 8:
20 divided by 21 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 46743.8
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 46743.809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 10:
When dividing 110 by 21, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 46743.8095
Subtract 105 from 110 to 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.

Let's proceed to step 11:
When dividing 50 by 21, we get 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 46743.80952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
When dividing 80 by 21, we get 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 46743.809523
Subtracting 63 from 80 leaves us 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.

Advancing to step 13:
When dividing 170 by 21, we get 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 46743.8095238
Deduct 168 from 170 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 14:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 46743.8095238
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 46743.8095238 with a remaining 2e-08.