We're dividing 946388 by 21 
Let's see how many times 21 fits into 946388.

Let's proceed to step 1:
9 divided by 21 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (4) from the dividend and append it to 9, then repeat: 94 / 21

Moving on to step 2:
When dividing 94 by 21, we get 4 with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 84 from 94 and we're left with 10.
Include the next digit (6) from the dividend after 10, then repeat: 106 / 21

Moving on to step 3:
The number 21 fits into 106 5 times, leaving a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 45.0
If we subtract 105 from 106, we get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 21

On to step 4:
21 goes into 13 0 times with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 450.0
Subtracting 0 from 13 leaves us with 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 21

Advancing to step 5:
The number 21 fits into 138 6 times, leaving a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 4506.0
If we subtract 126 from 138, we get 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 21

Step 6:
When dividing 128 by 21, we get 6 with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 45066.0
The remainder is 2 after subtracting 126 from 128.
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 7:
20 divided by 21 is 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 45066.0
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.

Advancing to step 8:
If we divide 200 by 21, we get 9 and a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 45066.09
If we subtract 189 from 200, we get 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 9:
110 divided by 21 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 45066.095
Deduct 105 from 110 and we're left 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.

Moving on to step 10:
50 divided by 21 is 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 45066.0952
If we take 42 away from 50, we end up 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.

On to step 11:
When dividing 80 by 21, we get 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 45066.09523
If we subtract 63 from 80, we 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 12:
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: 45066.095238
If we subtract 168 from 170, we get 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 13:
When dividing 20 by 21, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 45066.095238
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.

Advancing to step 14:
200 divided by 21 is 9 with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 45066.09523809
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.

The final result is 45066.09523809 with a remainder of 1.1e-08.