21451300 ÷ 768 
We're looking to find how many times 768 goes into 21451300.

Advancing to step 1:
768 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 / 768

Advancing to step 2:
768 goes into 21 0 times with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 768

Going ahead to step 3:
768 goes into 214 0 times with a remainder of 214.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 214 and we're left with 214.
Fetch the next digit (5) from the dividend, attach it to 214 and continue: 2145 / 768

Going ahead to step 4:
If we divide 2145 by 768, we get 2 and a remainder of 609.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 1536 from 2145 and we're left with 609.
Fetch the next digit (1) from the dividend, attach it to 609 and continue: 6091 / 768

Moving on to step 5:
The number 768 fits into 6091 7 times, leaving a remainder of 715.
Put 7 as the next digit of the answer. 
Result so far: 27.0
Subtracting 5376 from 6091 leaves us with 715.
Include the next digit (3) from the dividend after 715, then repeat: 7153 / 768

On to step 6:
7153 divided by 768 is 9 with a remainder of 241.
Write down 9 as next digit of the result. 
Result so far: 279.0
Subtracting 6912 from 7153 leaves us with 241.
Grab the next digit (0) from the dividend, add it to 241, then carry on: 2410 / 768

Advancing to step 7:
2410 divided by 768 is 3 with a remainder of 106.
The next digit of our result is 3. 
Result so far: 2793.0
If we take 2304 away from 2410, we end up with 106.
Append the next digit (0) from the dividend to 106 and continue with: 1060 / 768

On to step 8:
768 goes into 1060 1 times with a remainder of 292.
Record the quotient 1 as the next digit in the result. 
Result so far: 27931.0
If we subtract 768 from 1060, we get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

On to step 9:
768 goes into 2920 3 times with a remainder of 616.
Put 3 as the next digit of the answer. 
Result so far: 27931.3
Subtract 2304 from 2920 to get 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Let's proceed to step 10:
6160 divided by 768 is 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 27931.38
If we subtract 6144 from 6160, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
When dividing 160 by 768, we get 0 with a remainder of 160.
Write down 0 as next digit of the result. 
Result so far: 27931.38
Subtracting 0 from 160 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 12:
When dividing 1600 by 768, we get 2 with a remainder of 64.
Write down 2 as next digit of the result. 
Result so far: 27931.3802
If we subtract 1536 from 1600, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 13:
The number 768 fits into 640 0 times, leaving a remainder of 640.
Use 0 as the next digit of our solution. 
Result so far: 27931.3802
Subtracting 0 from 640 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Let's proceed to step 14:
When dividing 6400 by 768, we get 8 with a remainder of 256.
Put 8 as the next digit of the answer. 
Result so far: 27931.380208
Subtract 6144 from 6400 to get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Advancing to step 15:
768 can be fit into 2560 3 times, resulting in a remainder of 256.
Write down 3 as next digit of the result. 
Result so far: 27931.3802083
Subtract 2304 from 2560 to get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

On to step 16:
2560 divided by 768 is 3 with a remainder of 256.
Write down 3 as next digit of the result. 
Result so far: 27931.38020833
Subtract 2304 from 2560 to get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

After the division, we end up with 27931.38020833 and a remainder of 2.56e-07.