We're dividing 534400 by 21 
Let's see how many times 21 fits into 534400.

Moving on to step 1:
21 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 21

Let's proceed to step 2:
When dividing 53 by 21, we get 2 with a remainder of 11.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 42 from 53 to get 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 21

Advancing to step 3:
When dividing 114 by 21, we get 5 with a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
The remainder is 9 after subtracting 105 from 114.
Take the next digit (4) from the dividend and append it to 9, then repeat: 94 / 21

Advancing to step 4:
When dividing 94 by 21, we get 4 with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 254.0
If we take 84 away from 94, we end up with 10.
Take the next digit (0) from the dividend and append it to 10, then repeat: 100 / 21

Step 5:
100 divided by 21 is 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 2544.0
Subtracting 84 from 100 leaves us with 16.
Append the next digit (0) from the dividend to 16 and continue with: 160 / 21

On to step 6:
21 goes into 160 7 times with a remainder of 13.
The next digit of our result is 7. 
Result so far: 25447.0
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 25447.6
Subtracting 126 from 130 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
If we divide 40 by 21, we get 1 and a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 25447.61
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 9:
When dividing 190 by 21, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 25447.619
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 10:
10 divided by 21 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 25447.619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 11:
21 goes into 100 4 times with a remainder of 16.
The next digit of our result is 4. 
Result so far: 25447.61904
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 12:
When dividing 160 by 21, we get 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 25447.619047
Subtracting 147 from 160 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 13:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 25447.6190476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 14:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 25447.61904761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

After the division, we end up with 25447.61904761 and a remainder of 1.9e-08.