78438753 ÷ 256 
We want to figure out the number of times 78438753 can be divided by 256.

On to step 1:
The number 256 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 256

Moving on to step 2:
256 goes into 78 0 times with a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Append the next digit (4) from the dividend to 78 and continue with: 784 / 256

Moving on to step 3:
256 can be fit into 784 3 times, resulting in a remainder of 16.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 768 away from 784, we end up with 16.
Take the next digit (3) from the dividend and append it to 16, then repeat: 163 / 256

Let's proceed to step 4:
If we divide 163 by 256, we get 0 and a remainder of 163.
The next digit of our result is 0. 
Result so far: 30.0
If we take 0 away from 163, we end up with 163.
Grab the next digit (8) from the dividend, add it to 163, then carry on: 1638 / 256

Step 5:
256 can be fit into 1638 6 times, resulting in a remainder of 102.
Record the quotient 6 as the next digit in the result. 
Result so far: 306.0
If we take 1536 away from 1638, we end up with 102.
Bring next digit (7) of the dividend behind the 102 and repeat the process: 1027 / 256

Moving on to step 6:
When dividing 1027 by 256, we get 4 with a remainder of 3.
Record the quotient 4 as the next digit in the result. 
Result so far: 3064.0
Subtract 1024 from 1027 to get 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 256

Step 7:
If we divide 35 by 256, we get 0 and a remainder of 35.
Write down 0 as next digit of the result. 
Result so far: 30640.0
Subtract 0 from 35 to get 35.
Grab the next digit (3) from the dividend, add it to 35, then carry on: 353 / 256

Step 8:
256 can be fit into 353 1 times, resulting in a remainder of 97.
Put 1 as the next digit of the answer. 
Result so far: 306401.0
Deduct 256 from 353 and we're left with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Moving on to step 9:
256 can be fit into 970 3 times, resulting in a remainder of 202.
Use 3 as the next digit of our solution. 
Result so far: 306401.3
Subtracting 768 from 970 leaves us with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Moving on to step 10:
2020 divided by 256 is 7 with a remainder of 228.
The next digit of our result is 7. 
Result so far: 306401.37
If we take 1792 away from 2020, we end up with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Step 11:
256 goes into 2280 8 times with a remainder of 232.
The next digit of our result is 8. 
Result so far: 306401.378
Subtracting 2048 from 2280 leaves us with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Going ahead to step 12:
If we divide 2320 by 256, we get 9 and a remainder of 16.
Use 9 as the next digit of our solution. 
Result so far: 306401.3789
Subtract 2304 from 2320 to 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.

Step 13:
256 can be fit into 160 0 times, resulting in a remainder of 160.
Put 0 as the next digit of the answer. 
Result so far: 306401.3789
If we subtract 0 from 160, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 14:
When dividing 1600 by 256, we get 6 with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 306401.378906
Subtracting 1536 from 1600 leaves us 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.

Moving on to step 15:
640 divided by 256 is 2 with a remainder of 128.
Write down 2 as next digit of the result. 
Result so far: 306401.3789062
Deduct 512 from 640 and we're left with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 16:
When dividing 1280 by 256, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 306401.37890625
The remainder is 0 after subtracting 1280 from 1280.
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 306401.37890625, and the remainder is 0.0.