We look at the division of 21453548 by 521 
We want to divide 21453548 by 521.

Advancing to step 1:
When dividing 2 by 521, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 521

Going ahead to step 2:
521 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Include the next digit (4) from the dividend after 21, then repeat: 214 / 521

Let's proceed to step 3:
The number 521 fits into 214 0 times, leaving a remainder of 214.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 214, we get 214.
Take the next digit (5) from the dividend and append it to 214, then repeat: 2145 / 521

Moving on to step 4:
The number 521 fits into 2145 4 times, leaving a remainder of 61.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 2084 from 2145 leaves us with 61.
Fetch the next digit (3) from the dividend, attach it to 61 and continue: 613 / 521

Let's proceed to step 5:
521 can be fit into 613 1 times, resulting in a remainder of 92.
The number 1 becomes the next digit in our result. 
Result so far: 41.0
Subtracting 521 from 613 leaves us with 92.
Take the next digit (5) from the dividend and append it to 92, then repeat: 925 / 521

Advancing to step 6:
521 goes into 925 1 times with a remainder of 404.
Put 1 as the next digit of the answer. 
Result so far: 411.0
Deduct 521 from 925 and we're left with 404.
Include the next digit (4) from the dividend after 404, then repeat: 4044 / 521

Moving on to step 7:
When dividing 4044 by 521, we get 7 with a remainder of 397.
The number 7 becomes the next digit in our result. 
Result so far: 4117.0
If we take 3647 away from 4044, we end up with 397.
Fetch the next digit (8) from the dividend, attach it to 397 and continue: 3978 / 521

Step 8:
The number 521 fits into 3978 7 times, leaving a remainder of 331.
The number 7 becomes the next digit in our result. 
Result so far: 41177.0
If we take 3647 away from 3978, we end up with 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Advancing to step 9:
The number 521 fits into 3310 6 times, leaving a remainder of 184.
Put 6 as the next digit of the answer. 
Result so far: 41177.6
Subtract 3126 from 3310 to get 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

On to step 10:
If we divide 1840 by 521, we get 3 and a remainder of 277.
The number 3 becomes the next digit in our result. 
Result so far: 41177.63
If we take 1563 away from 1840, we end up with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Advancing to step 11:
When dividing 2770 by 521, we get 5 with a remainder of 165.
The number 5 becomes the next digit in our result. 
Result so far: 41177.635
The remainder is 165 after subtracting 2605 from 2770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Advancing to step 12:
When dividing 1650 by 521, we get 3 with a remainder of 87.
The next digit of our result is 3. 
Result so far: 41177.6353
The remainder is 87 after subtracting 1563 from 1650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 13:
The number 521 fits into 870 1 times, leaving a remainder of 349.
Write down 1 as next digit of the result. 
Result so far: 41177.63531
Subtracting 521 from 870 leaves us with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Going ahead to step 14:
If we divide 3490 by 521, we get 6 and a remainder of 364.
The number 6 becomes the next digit in our result. 
Result so far: 41177.635316
If we take 3126 away from 3490, we end up with 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Let's proceed to step 15:
When dividing 3640 by 521, we get 6 with a remainder of 514.
Use 6 as the next digit of our solution. 
Result so far: 41177.6353166
Subtracting 3126 from 3640 leaves us with 514.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

The quotient of the division is 41177.6353166, and the remainder is 5.14e-06.