We're dividing 477057 by 21 
Our goal is to divide 477057 by 21.

Going ahead to step 1:
21 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (7) from the dividend, attach it to 4 and continue: 47 / 21

Advancing to step 2:
When dividing 47 by 21, we get 2 with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 42 from 47 and we're left with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 21

Step 3:
21 can be fit into 57 2 times, resulting in a remainder of 15.
Put 2 as the next digit of the answer. 
Result so far: 22.0
Subtract 42 from 57 to get 15.
Bring next digit (0) of the dividend behind the 15 and repeat the process: 150 / 21

Let's proceed to step 4:
If we divide 150 by 21, we get 7 and a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 227.0
The remainder is 3 after subtracting 147 from 150.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 21

Going ahead to step 5:
If we divide 35 by 21, we get 1 and a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 2271.0
The remainder is 14 after subtracting 21 from 35.
Append the next digit (7) from the dividend to 14 and continue with: 147 / 21

Step 6:
The number 21 fits into 147 7 times, leaving a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 22717.0
The remainder is 0 after subtracting 147 from 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
If we divide 0 by 21, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 22717.0
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.

Let's proceed to step 8:
If we divide 0 by 21, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 22717.0
If we take 0 away from 0, 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.

The final outcome is 22717.0, with a leftover of 0.0.