477925 divided by 21 
We want to figure out the number of times 477925 can be divided by 21.

Advancing to step 1:
If we divide 4 by 21, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (7) from the dividend after 4, then repeat: 47 / 21

Let's proceed to step 2:
47 divided by 21 is 2 with a remainder of 5.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 42 from 47 leaves us with 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 21

On to step 3:
The number 21 fits into 57 2 times, leaving a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
The remainder is 15 after subtracting 42 from 57.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 21

Advancing to step 4:
The number 21 fits into 159 7 times, leaving a remainder of 12.
The next digit of our result is 7. 
Result so far: 227.0
The remainder is 12 after subtracting 147 from 159.
Include the next digit (2) from the dividend after 12, then repeat: 122 / 21

Advancing to step 5:
122 divided by 21 is 5 with a remainder of 17.
Write down 5 as next digit of the result. 
Result so far: 2275.0
Subtracting 105 from 122 leaves us with 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 21

Let's proceed to step 6:
If we divide 175 by 21, we get 8 and a remainder of 7.
The number 8 becomes the next digit in our result. 
Result so far: 22758.0
The remainder is 7 after subtracting 168 from 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
70 divided by 21 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 22758.3
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 8:
21 can be fit into 70 3 times, resulting in a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 22758.33
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final outcome is 22758.33, with a leftover of 0.007.