Let's divide 507444 by 21
We're looking to find how many times 21 goes into 507444.

Advancing to step 1:
5 divided by 21 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 21

Let's proceed to step 2:
21 goes into 50 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 42 from 50 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 21

Let's proceed to step 3:
If we divide 87 by 21, we get 4 and a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 24.0
If we take 84 away from 87, we end up with 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 21

Moving on to step 4:
When dividing 34 by 21, we get 1 with a remainder of 13.
The number 1 becomes the next digit in our result. 
Result so far: 241.0
The remainder is 13 after subtracting 21 from 34.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 21

Moving on to step 5:
21 goes into 134 6 times with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 2416.0
The remainder is 8 after subtracting 126 from 134.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 21

Moving on to step 6:
21 can be fit into 84 4 times, resulting in a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 24164.0
If we take 84 away from 84, 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.

Advancing to step 7:
0 divided by 21 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 24164.0
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.

Step 8:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 24164.0
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 quotient of the division is 24164.0, and the remainder is 0.0.