We look at the division of 21246149 by 454 
Let's see how many times 454 fits into 21246149.

Moving on to step 1:
When dividing 2 by 454, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 454

Advancing to step 2:
454 can be fit into 21 0 times, resulting in a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (2) from the dividend, add it to 21, then carry on: 212 / 454

Advancing to step 3:
212 divided by 454 is 0 with a remainder of 212.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 212 after subtracting 0 from 212.
Grab the next digit (4) from the dividend, add it to 212, then carry on: 2124 / 454

Let's proceed to step 4:
454 can be fit into 2124 4 times, resulting in a remainder of 308.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtract 1816 from 2124 to get 308.
Include the next digit (6) from the dividend after 308, then repeat: 3086 / 454

Going ahead to step 5:
454 goes into 3086 6 times with a remainder of 362.
Put 6 as the next digit of the answer. 
Result so far: 46.0
If we take 2724 away from 3086, we end up with 362.
Take the next digit (1) from the dividend and append it to 362, then repeat: 3621 / 454

Let's proceed to step 6:
454 goes into 3621 7 times with a remainder of 443.
Use 7 as the next digit of our solution. 
Result so far: 467.0
If we subtract 3178 from 3621, we get 443.
Fetch the next digit (4) from the dividend, attach it to 443 and continue: 4434 / 454

Advancing to step 7:
454 can be fit into 4434 9 times, resulting in a remainder of 348.
Write down 9 as next digit of the result. 
Result so far: 4679.0
If we take 4086 away from 4434, we end up with 348.
Append the next digit (9) from the dividend to 348 and continue with: 3489 / 454

Let's proceed to step 8:
When dividing 3489 by 454, we get 7 with a remainder of 311.
The number 7 becomes the next digit in our result. 
Result so far: 46797.0
If we take 3178 away from 3489, we end up with 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Advancing to step 9:
When dividing 3110 by 454, we get 6 with a remainder of 386.
Put 6 as the next digit of the answer. 
Result so far: 46797.6
Subtracting 2724 from 3110 leaves us with 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

On to step 10:
If we divide 3860 by 454, we get 8 and a remainder of 228.
Put 8 as the next digit of the answer. 
Result so far: 46797.68
If we subtract 3632 from 3860, we get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

On to step 11:
454 can be fit into 2280 5 times, resulting in a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 46797.685
Subtract 2270 from 2280 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.

Going ahead to step 12:
100 divided by 454 is 0 with a remainder of 100.
The next digit of our result is 0. 
Result so far: 46797.685
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 13:
If we divide 1000 by 454, we get 2 and a remainder of 92.
Put 2 as the next digit of the answer. 
Result so far: 46797.68502
The remainder is 92 after subtracting 908 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 14:
454 can be fit into 920 2 times, resulting in a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 46797.685022
If we take 908 away from 920, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 46797.685022 with a remainder of 1.2e-06.