904470 ÷ 21 
Let's see how many times 21 fits into 904470.

Advancing to step 1:
21 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 21

Advancing to step 2:
21 goes into 90 4 times with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 84 from 90 and we're left with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 21

Step 3:
The number 21 fits into 64 3 times, leaving a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtract 63 from 64 to get 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 21

Advancing to step 4:
21 goes into 14 0 times with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 430.0
Subtract 0 from 14 to get 14.
Include the next digit (7) from the dividend after 14, then repeat: 147 / 21

Advancing to step 5:
21 goes into 147 7 times with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 4307.0
Deduct 147 from 147 and we're left with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 21

Going ahead to step 6:
If we divide 0 by 21, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 43070.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
0 divided by 21 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 43070.0
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.

Moving on to step 8:
21 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 43070.0
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.

The final result is 43070.0 with a remainder of 0.0.