We're dividing 31143139 by 256 
We want to divide 31143139 by 256.

Let's proceed to step 1:
When dividing 3 by 256, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 256

Let's proceed to step 2:
256 goes into 31 0 times with a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 31, we end up with 31.
Take the next digit (1) from the dividend and append it to 31, then repeat: 311 / 256

Step 3:
The number 256 fits into 311 1 times, leaving a remainder of 55.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 256 from 311, we get 55.
Include the next digit (4) from the dividend after 55, then repeat: 554 / 256

On to step 4:
When dividing 554 by 256, we get 2 with a remainder of 42.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we subtract 512 from 554, we get 42.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 256

Let's proceed to step 5:
256 can be fit into 423 1 times, resulting in a remainder of 167.
The number 1 becomes the next digit in our result. 
Result so far: 121.0
If we take 256 away from 423, we end up with 167.
Take the next digit (1) from the dividend and append it to 167, then repeat: 1671 / 256

On to step 6:
If we divide 1671 by 256, we get 6 and a remainder of 135.
Record the quotient 6 as the next digit in the result. 
Result so far: 1216.0
The remainder is 135 after subtracting 1536 from 1671.
Fetch the next digit (3) from the dividend, attach it to 135 and continue: 1353 / 256

On to step 7:
If we divide 1353 by 256, we get 5 and a remainder of 73.
Write down 5 as next digit of the result. 
Result so far: 12165.0
Subtract 1280 from 1353 to get 73.
Bring next digit (9) of the dividend behind the 73 and repeat the process: 739 / 256

Going ahead to step 8:
When dividing 739 by 256, we get 2 with a remainder of 227.
Put 2 as the next digit of the answer. 
Result so far: 121652.0
If we take 512 away from 739, we end up with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

On to step 9:
2270 divided by 256 is 8 with a remainder of 222.
Put 8 as the next digit of the answer. 
Result so far: 121652.8
Subtracting 2048 from 2270 leaves us with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Step 10:
256 goes into 2220 8 times with a remainder of 172.
Record the quotient 8 as the next digit in the result. 
Result so far: 121652.88
If we subtract 2048 from 2220, we get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

The final outcome is 121652.88, with a leftover of 0.172.