Let's divide 10454100 by 821
We're looking to find how many times 821 goes into 10454100.

Step 1:
When dividing 1 by 821, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 821

Moving on to step 2:
821 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 10, we get 10.
Take the next digit (4) from the dividend and append it to 10, then repeat: 104 / 821

Let's proceed to step 3:
When dividing 104 by 821, we get 0 with a remainder of 104.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 104, we get 104.
Bring next digit (5) of the dividend behind the 104 and repeat the process: 1045 / 821

Going ahead to step 4:
821 can be fit into 1045 1 times, resulting in a remainder of 224.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 821 from 1045 and we're left with 224.
Append the next digit (4) from the dividend to 224 and continue with: 2244 / 821

On to step 5:
The number 821 fits into 2244 2 times, leaving a remainder of 602.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtract 1642 from 2244 to get 602.
Take the next digit (1) from the dividend and append it to 602, then repeat: 6021 / 821

Advancing to step 6:
The number 821 fits into 6021 7 times, leaving a remainder of 274.
The number 7 becomes the next digit in our result. 
Result so far: 127.0
If we take 5747 away from 6021, we end up with 274.
Grab the next digit (0) from the dividend, add it to 274, then carry on: 2740 / 821

Let's proceed to step 7:
821 goes into 2740 3 times with a remainder of 277.
Put 3 as the next digit of the answer. 
Result so far: 1273.0
Subtract 2463 from 2740 to get 277.
Grab the next digit (0) from the dividend, add it to 277, then carry on: 2770 / 821

Advancing to step 8:
The number 821 fits into 2770 3 times, leaving a remainder of 307.
Use 3 as the next digit of our solution. 
Result so far: 12733.0
If we take 2463 away from 2770, we end up with 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

Moving on to step 9:
3070 divided by 821 is 3 with a remainder of 607.
Use 3 as the next digit of our solution. 
Result so far: 12733.3
If we take 2463 away from 3070, we end up with 607.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6070, and continue the process.

Moving on to step 10:
If we divide 6070 by 821, we get 7 and a remainder of 323.
Record the quotient 7 as the next digit in the result. 
Result so far: 12733.37
If we take 5747 away from 6070, we end up with 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

Moving on to step 11:
When dividing 3230 by 821, we get 3 with a remainder of 767.
The number 3 becomes the next digit in our result. 
Result so far: 12733.373
If we take 2463 away from 3230, we end up with 767.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7670, and continue the process.

Advancing to step 12:
7670 divided by 821 is 9 with a remainder of 281.
Record the quotient 9 as the next digit in the result. 
Result so far: 12733.3739
If we take 7389 away from 7670, we end up with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Moving on to step 13:
The number 821 fits into 2810 3 times, leaving a remainder of 347.
Use 3 as the next digit of our solution. 
Result so far: 12733.37393
If we take 2463 away from 2810, we end up with 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Moving on to step 14:
When dividing 3470 by 821, we get 4 with a remainder of 186.
Put 4 as the next digit of the answer. 
Result so far: 12733.373934
Subtracting 3284 from 3470 leaves us with 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Step 15:
If we divide 1860 by 821, we get 2 and a remainder of 218.
Use 2 as the next digit of our solution. 
Result so far: 12733.3739342
If we subtract 1642 from 1860, we get 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Moving on to step 16:
The number 821 fits into 2180 2 times, leaving a remainder of 538.
The number 2 becomes the next digit in our result. 
Result so far: 12733.37393422
If we subtract 1642 from 2180, we get 538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

The final result is 12733.37393422 with a remainder of 5.38e-07.