Let's divide 21402642 by 256
We're looking to find how many times 256 goes into 21402642.

Let's proceed to step 1:
When dividing 2 by 256, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 256

Going ahead to step 2:
If we divide 21 by 256, we get 0 and a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (4) from the dividend to 21 and continue with: 214 / 256

On to step 3:
256 goes into 214 0 times with a remainder of 214.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 214, we end up with 214.
Bring next digit (0) of the dividend behind the 214 and repeat the process: 2140 / 256

On to step 4:
2140 divided by 256 is 8 with a remainder of 92.
The next digit of our result is 8. 
Result so far: 8.0
Deduct 2048 from 2140 and we're left with 92.
Grab the next digit (2) from the dividend, add it to 92, then carry on: 922 / 256

On to step 5:
The number 256 fits into 922 3 times, leaving a remainder of 154.
Use 3 as the next digit of our solution. 
Result so far: 83.0
If we subtract 768 from 922, we get 154.
Append the next digit (6) from the dividend to 154 and continue with: 1546 / 256

Step 6:
The number 256 fits into 1546 6 times, leaving a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 836.0
If we take 1536 away from 1546, we end up with 10.
Bring next digit (4) of the dividend behind the 10 and repeat the process: 104 / 256

Step 7:
256 can be fit into 104 0 times, resulting in a remainder of 104.
Put 0 as the next digit of the answer. 
Result so far: 8360.0
Subtracting 0 from 104 leaves us with 104.
Append the next digit (2) from the dividend to 104 and continue with: 1042 / 256

Going ahead to step 8:
256 can be fit into 1042 4 times, resulting in a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 83604.0
The remainder is 18 after subtracting 1024 from 1042.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 9:
180 divided by 256 is 0 with a remainder of 180.
Write down 0 as next digit of the result. 
Result so far: 83604.0
If we take 0 away from 180, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Moving on to step 10:
When dividing 1800 by 256, we get 7 with a remainder of 8.
The next digit of our result is 7. 
Result so far: 83604.07
Deduct 1792 from 1800 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 11:
256 goes into 80 0 times with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 83604.07
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 12:
800 divided by 256 is 3 with a remainder of 32.
Use 3 as the next digit of our solution. 
Result so far: 83604.0703
If we subtract 768 from 800, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 13:
The number 256 fits into 320 1 times, leaving a remainder of 64.
The next digit of our result is 1. 
Result so far: 83604.07031
Deduct 256 from 320 and we're left with 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 14:
640 divided by 256 is 2 with a remainder of 128.
Write down 2 as next digit of the result. 
Result so far: 83604.070312
The remainder is 128 after subtracting 512 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Let's proceed to step 15:
The number 256 fits into 1280 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 83604.0703125
Subtract 1280 from 1280 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 16:
The number 256 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 83604.0703125
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 83604.0703125, and the remainder is 0.0.