We look at the division of 91421397 by 456 
We want to divide 91421397 by 456.

Let's proceed to step 1:
If we divide 9 by 456, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 456

Advancing to step 2:
456 can be fit into 91 0 times, resulting in a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Bring next digit (4) of the dividend behind the 91 and repeat the process: 914 / 456

Advancing to step 3:
When dividing 914 by 456, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 2 after subtracting 912 from 914.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 456

Advancing to step 4:
456 can be fit into 22 0 times, resulting in a remainder of 22.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
If we take 0 away from 22, we end up with 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 456

Step 5:
If we divide 221 by 456, we get 0 and a remainder of 221.
Put 0 as the next digit of the answer. 
Result so far: 200.0
If we subtract 0 from 221, we get 221.
Take the next digit (3) from the dividend and append it to 221, then repeat: 2213 / 456

Moving on to step 6:
When dividing 2213 by 456, we get 4 with a remainder of 389.
Record the quotient 4 as the next digit in the result. 
Result so far: 2004.0
Subtract 1824 from 2213 to get 389.
Fetch the next digit (9) from the dividend, attach it to 389 and continue: 3899 / 456

Moving on to step 7:
456 goes into 3899 8 times with a remainder of 251.
The number 8 becomes the next digit in our result. 
Result so far: 20048.0
If we take 3648 away from 3899, we end up with 251.
Append the next digit (7) from the dividend to 251 and continue with: 2517 / 456

Step 8:
If we divide 2517 by 456, we get 5 and a remainder of 237.
Write down 5 as next digit of the result. 
Result so far: 200485.0
Deduct 2280 from 2517 and we're left with 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

On to step 9:
If we divide 2370 by 456, we get 5 and a remainder of 90.
Put 5 as the next digit of the answer. 
Result so far: 200485.5
Subtracting 2280 from 2370 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Step 10:
When dividing 900 by 456, we get 1 with a remainder of 444.
Record the quotient 1 as the next digit in the result. 
Result so far: 200485.51
Subtract 456 from 900 to get 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Step 11:
If we divide 4440 by 456, we get 9 and a remainder of 336.
The number 9 becomes the next digit in our result. 
Result so far: 200485.519
The remainder is 336 after subtracting 4104 from 4440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Moving on to step 12:
456 can be fit into 3360 7 times, resulting in a remainder of 168.
The next digit of our result is 7. 
Result so far: 200485.5197
The remainder is 168 after subtracting 3192 from 3360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Step 13:
When dividing 1680 by 456, we get 3 with a remainder of 312.
Put 3 as the next digit of the answer. 
Result so far: 200485.51973
If we subtract 1368 from 1680, we get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 14:
If we divide 3120 by 456, we get 6 and a remainder of 384.
The next digit of our result is 6. 
Result so far: 200485.519736
The remainder is 384 after subtracting 2736 from 3120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

On to step 15:
3840 divided by 456 is 8 with a remainder of 192.
Use 8 as the next digit of our solution. 
Result so far: 200485.5197368
Subtracting 3648 from 3840 leaves us with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Advancing to step 16:
456 can be fit into 1920 4 times, resulting in a remainder of 96.
Put 4 as the next digit of the answer. 
Result so far: 200485.51973684
If we subtract 1824 from 1920, we get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

The final outcome is 200485.51973684, with a leftover of 9.6e-08.