21249791 ÷ 318 
We want to figure out the number of times 21249791 can be divided by 318.

Step 1:
When dividing 2 by 318, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
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 / 318

Advancing to step 2:
318 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 318

Moving on to step 3:
When dividing 212 by 318, we get 0 with a remainder of 212.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 212 leaves us with 212.
Fetch the next digit (4) from the dividend, attach it to 212 and continue: 2124 / 318

Let's proceed to step 4:
The number 318 fits into 2124 6 times, leaving a remainder of 216.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 1908 from 2124 leaves us with 216.
Take the next digit (9) from the dividend and append it to 216, then repeat: 2169 / 318

Moving on to step 5:
318 goes into 2169 6 times with a remainder of 261.
Write down 6 as next digit of the result. 
Result so far: 66.0
The remainder is 261 after subtracting 1908 from 2169.
Grab the next digit (7) from the dividend, add it to 261, then carry on: 2617 / 318

On to step 6:
If we divide 2617 by 318, we get 8 and a remainder of 73.
Record the quotient 8 as the next digit in the result. 
Result so far: 668.0
The remainder is 73 after subtracting 2544 from 2617.
Include the next digit (9) from the dividend after 73, then repeat: 739 / 318

Advancing to step 7:
739 divided by 318 is 2 with a remainder of 103.
Use 2 as the next digit of our solution. 
Result so far: 6682.0
If we take 636 away from 739, we end up with 103.
Bring next digit (1) of the dividend behind the 103 and repeat the process: 1031 / 318

Advancing to step 8:
1031 divided by 318 is 3 with a remainder of 77.
Write down 3 as next digit of the result. 
Result so far: 66823.0
The remainder is 77 after subtracting 954 from 1031.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 9:
When dividing 770 by 318, we get 2 with a remainder of 134.
Record the quotient 2 as the next digit in the result. 
Result so far: 66823.2
If we subtract 636 from 770, we get 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Step 10:
318 can be fit into 1340 4 times, resulting in a remainder of 68.
Use 4 as the next digit of our solution. 
Result so far: 66823.24
If we take 1272 away from 1340, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 11:
680 divided by 318 is 2 with a remainder of 44.
Write down 2 as next digit of the result. 
Result so far: 66823.242
If we subtract 636 from 680, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 12:
When dividing 440 by 318, we get 1 with a remainder of 122.
Put 1 as the next digit of the answer. 
Result so far: 66823.2421
If we take 318 away from 440, we end up with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Step 13:
The number 318 fits into 1220 3 times, leaving a remainder of 266.
Write down 3 as next digit of the result. 
Result so far: 66823.24213
Deduct 954 from 1220 and we're left with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Going ahead to step 14:
318 can be fit into 2660 8 times, resulting in a remainder of 116.
The next digit of our result is 8. 
Result so far: 66823.242138
The remainder is 116 after subtracting 2544 from 2660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Let's proceed to step 15:
If we divide 1160 by 318, we get 3 and a remainder of 206.
The number 3 becomes the next digit in our result. 
Result so far: 66823.2421383
Subtract 954 from 1160 to get 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

On to step 16:
If we divide 2060 by 318, we get 6 and a remainder of 152.
Write down 6 as next digit of the result. 
Result so far: 66823.24213836
If we subtract 1908 from 2060, we get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

The quotient of the division is 66823.24213836, and the remainder is 1.52e-07.