21188052 ÷ 518 
We want to figure out the number of times 21188052 can be divided by 518.

Let's proceed to step 1:
518 goes into 2 0 times with 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.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 518

Step 2:
518 can be fit into 21 0 times, resulting in a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (1) from the dividend, add it to 21, then carry on: 211 / 518

Going ahead to step 3:
The number 518 fits into 211 0 times, leaving a remainder of 211.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 211, we end up with 211.
Grab the next digit (8) from the dividend, add it to 211, then carry on: 2118 / 518

Advancing to step 4:
518 can be fit into 2118 4 times, resulting in a remainder of 46.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 2072 away from 2118, we end up with 46.
Take the next digit (8) from the dividend and append it to 46, then repeat: 468 / 518

On to step 5:
518 can be fit into 468 0 times, resulting in a remainder of 468.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Subtract 0 from 468 to get 468.
Take the next digit (0) from the dividend and append it to 468, then repeat: 4680 / 518

Step 6:
518 can be fit into 4680 9 times, resulting in a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 409.0
If we take 4662 away from 4680, we end up with 18.
Include the next digit (5) from the dividend after 18, then repeat: 185 / 518

Moving on to step 7:
518 goes into 185 0 times with a remainder of 185.
The next digit of our result is 0. 
Result so far: 4090.0
If we take 0 away from 185, we end up with 185.
Include the next digit (2) from the dividend after 185, then repeat: 1852 / 518

Step 8:
518 can be fit into 1852 3 times, resulting in a remainder of 298.
Put 3 as the next digit of the answer. 
Result so far: 40903.0
If we take 1554 away from 1852, we end up with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

On to step 9:
The number 518 fits into 2980 5 times, leaving a remainder of 390.
The next digit of our result is 5. 
Result so far: 40903.5
Deduct 2590 from 2980 and we're left with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Advancing to step 10:
The number 518 fits into 3900 7 times, leaving a remainder of 274.
Record the quotient 7 as the next digit in the result. 
Result so far: 40903.57
The remainder is 274 after subtracting 3626 from 3900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Step 11:
518 can be fit into 2740 5 times, resulting in a remainder of 150.
The number 5 becomes the next digit in our result. 
Result so far: 40903.575
The remainder is 150 after subtracting 2590 from 2740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 12:
518 goes into 1500 2 times with a remainder of 464.
Write down 2 as next digit of the result. 
Result so far: 40903.5752
If we take 1036 away from 1500, we end up with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Step 13:
518 goes into 4640 8 times with a remainder of 496.
The next digit of our result is 8. 
Result so far: 40903.57528
If we subtract 4144 from 4640, we get 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Step 14:
518 can be fit into 4960 9 times, resulting in a remainder of 298.
The number 9 becomes the next digit in our result. 
Result so far: 40903.575289
The remainder is 298 after subtracting 4662 from 4960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Step 15:
When dividing 2980 by 518, we get 5 with a remainder of 390.
Record the quotient 5 as the next digit in the result. 
Result so far: 40903.5752895
Subtract 2590 from 2980 to get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Step 16:
3900 divided by 518 is 7 with a remainder of 274.
Put 7 as the next digit of the answer. 
Result so far: 40903.57528957
Subtracting 3626 from 3900 leaves us with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

The final result is 40903.57528957 with a remainder of 2.74e-07.