20721216 divided by 516 
We're looking to find how many times 516 goes into 20721216.

Advancing to step 1:
The number 516 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 516

Going ahead to step 2:
516 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 20 to get 20.
Append the next digit (7) from the dividend to 20 and continue with: 207 / 516

On to step 3:
When dividing 207 by 516, we get 0 with a remainder of 207.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 207, we get 207.
Append the next digit (2) from the dividend to 207 and continue with: 2072 / 516

On to step 4:
516 can be fit into 2072 4 times, resulting in a remainder of 8.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 8 after subtracting 2064 from 2072.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 516

Going ahead to step 5:
516 goes into 81 0 times with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 40.0
The remainder is 81 after subtracting 0 from 81.
Fetch the next digit (2) from the dividend, attach it to 81 and continue: 812 / 516

Advancing to step 6:
516 goes into 812 1 times with a remainder of 296.
The number 1 becomes the next digit in our result. 
Result so far: 401.0
Subtract 516 from 812 to get 296.
Take the next digit (1) from the dividend and append it to 296, then repeat: 2961 / 516

Let's proceed to step 7:
If we divide 2961 by 516, we get 5 and a remainder of 381.
Put 5 as the next digit of the answer. 
Result so far: 4015.0
Subtracting 2580 from 2961 leaves us with 381.
Fetch the next digit (6) from the dividend, attach it to 381 and continue: 3816 / 516

Moving on to step 8:
516 can be fit into 3816 7 times, resulting in a remainder of 204.
Record the quotient 7 as the next digit in the result. 
Result so far: 40157.0
If we subtract 3612 from 3816, we get 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Advancing to step 9:
If we divide 2040 by 516, we get 3 and a remainder of 492.
Record the quotient 3 as the next digit in the result. 
Result so far: 40157.3
The remainder is 492 after subtracting 1548 from 2040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

Let's proceed to step 10:
When dividing 4920 by 516, we get 9 with a remainder of 276.
Use 9 as the next digit of our solution. 
Result so far: 40157.39
Subtracting 4644 from 4920 leaves us with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Let's proceed to step 11:
2760 divided by 516 is 5 with a remainder of 180.
Put 5 as the next digit of the answer. 
Result so far: 40157.395
The remainder is 180 after subtracting 2580 from 2760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Let's proceed to step 12:
The number 516 fits into 1800 3 times, leaving a remainder of 252.
Record the quotient 3 as the next digit in the result. 
Result so far: 40157.3953
If we subtract 1548 from 1800, we get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Advancing to step 13:
When dividing 2520 by 516, we get 4 with a remainder of 456.
Use 4 as the next digit of our solution. 
Result so far: 40157.39534
If we take 2064 away from 2520, we end up with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Advancing to step 14:
4560 divided by 516 is 8 with a remainder of 432.
Record the quotient 8 as the next digit in the result. 
Result so far: 40157.395348
If we subtract 4128 from 4560, we get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Going ahead to step 15:
4320 divided by 516 is 8 with a remainder of 192.
Put 8 as the next digit of the answer. 
Result so far: 40157.3953488
Subtract 4128 from 4320 to get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

The final outcome is 40157.3953488, with a leftover of 1.92e-06.