21016572 divided by 521 
We want to divide 21016572 by 521.

Moving on to step 1:
2 divided by 521 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 521

Advancing to step 2:
The number 521 fits into 21 0 times, leaving a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Bring next digit (0) of the dividend behind the 21 and repeat the process: 210 / 521

Going ahead to step 3:
521 goes into 210 0 times with a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 210, we get 210.
Take the next digit (1) from the dividend and append it to 210, then repeat: 2101 / 521

Moving on to step 4:
521 can be fit into 2101 4 times, resulting in a remainder of 17.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 2084 from 2101 and we're left with 17.
Include the next digit (6) from the dividend after 17, then repeat: 176 / 521

Going ahead to step 5:
If we divide 176 by 521, we get 0 and a remainder of 176.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
The remainder is 176 after subtracting 0 from 176.
Append the next digit (5) from the dividend to 176 and continue with: 1765 / 521

Let's proceed to step 6:
521 goes into 1765 3 times with a remainder of 202.
Put 3 as the next digit of the answer. 
Result so far: 403.0
The remainder is 202 after subtracting 1563 from 1765.
Bring next digit (7) of the dividend behind the 202 and repeat the process: 2027 / 521

Advancing to step 7:
The number 521 fits into 2027 3 times, leaving a remainder of 464.
The next digit of our result is 3. 
Result so far: 4033.0
The remainder is 464 after subtracting 1563 from 2027.
Fetch the next digit (2) from the dividend, attach it to 464 and continue: 4642 / 521

Moving on to step 8:
If we divide 4642 by 521, we get 8 and a remainder of 474.
Record the quotient 8 as the next digit in the result. 
Result so far: 40338.0
Subtracting 4168 from 4642 leaves us with 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

On to step 9:
If we divide 4740 by 521, we get 9 and a remainder of 51.
Put 9 as the next digit of the answer. 
Result so far: 40338.9
If we subtract 4689 from 4740, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 10:
510 divided by 521 is 0 with a remainder of 510.
Use 0 as the next digit of our solution. 
Result so far: 40338.9
Subtract 0 from 510 to get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Going ahead to step 11:
The number 521 fits into 5100 9 times, leaving a remainder of 411.
Write down 9 as next digit of the result. 
Result so far: 40338.909
The remainder is 411 after subtracting 4689 from 5100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4110, and continue the process.

Moving on to step 12:
The number 521 fits into 4110 7 times, leaving a remainder of 463.
Record the quotient 7 as the next digit in the result. 
Result so far: 40338.9097
Subtracting 3647 from 4110 leaves us with 463.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4630, and continue the process.

Moving on to step 13:
521 goes into 4630 8 times with a remainder of 462.
Put 8 as the next digit of the answer. 
Result so far: 40338.90978
Subtract 4168 from 4630 to get 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Going ahead to step 14:
521 goes into 4620 8 times with a remainder of 452.
Use 8 as the next digit of our solution. 
Result so far: 40338.909788
Deduct 4168 from 4620 and we're left with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

After the division, we end up with 40338.909788 and a remainder of 4.52e-05.