21640676 divided by 513 
Let's see how many times 513 fits into 21640676.

On to step 1:
2 divided by 513 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 513

Step 2:
513 goes into 21 0 times with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Grab the next digit (6) from the dividend, add it to 21, then carry on: 216 / 513

Step 3:
216 divided by 513 is 0 with a remainder of 216.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 216, we get 216.
Take the next digit (4) from the dividend and append it to 216, then repeat: 2164 / 513

Advancing to step 4:
The number 513 fits into 2164 4 times, leaving a remainder of 112.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 2052 from 2164 and we're left with 112.
Include the next digit (0) from the dividend after 112, then repeat: 1120 / 513

Moving on to step 5:
When dividing 1120 by 513, we get 2 with a remainder of 94.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
Subtract 1026 from 1120 to get 94.
Include the next digit (6) from the dividend after 94, then repeat: 946 / 513

Advancing to step 6:
513 can be fit into 946 1 times, resulting in a remainder of 433.
Put 1 as the next digit of the answer. 
Result so far: 421.0
If we subtract 513 from 946, we get 433.
Include the next digit (7) from the dividend after 433, then repeat: 4337 / 513

Let's proceed to step 7:
4337 divided by 513 is 8 with a remainder of 233.
The next digit of our result is 8. 
Result so far: 4218.0
Subtracting 4104 from 4337 leaves us with 233.
Include the next digit (6) from the dividend after 233, then repeat: 2336 / 513

On to step 8:
513 goes into 2336 4 times with a remainder of 284.
Write down 4 as next digit of the result. 
Result so far: 42184.0
Subtract 2052 from 2336 to get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Let's proceed to step 9:
When dividing 2840 by 513, we get 5 with a remainder of 275.
The next digit of our result is 5. 
Result so far: 42184.5
Deduct 2565 from 2840 and we're left with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Advancing to step 10:
When dividing 2750 by 513, we get 5 with a remainder of 185.
Put 5 as the next digit of the answer. 
Result so far: 42184.55
Subtracting 2565 from 2750 leaves us with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

In conclusion, the division gives 42184.55 with a balance of 0.185.