We look at the division of 57131485 by 243 
Our goal is to divide 57131485 by 243.

Advancing to step 1:
If we divide 5 by 243, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 243

Step 2:
57 divided by 243 is 0 with a remainder of 57.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 57, we get 57.
Grab the next digit (1) from the dividend, add it to 57, then carry on: 571 / 243

Let's proceed to step 3:
571 divided by 243 is 2 with a remainder of 85.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 85 after subtracting 486 from 571.
Append the next digit (3) from the dividend to 85 and continue with: 853 / 243

Let's proceed to step 4:
243 goes into 853 3 times with a remainder of 124.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
Deduct 729 from 853 and we're left with 124.
Grab the next digit (1) from the dividend, add it to 124, then carry on: 1241 / 243

On to step 5:
The number 243 fits into 1241 5 times, leaving a remainder of 26.
The number 5 becomes the next digit in our result. 
Result so far: 235.0
Deduct 1215 from 1241 and we're left with 26.
Fetch the next digit (4) from the dividend, attach it to 26 and continue: 264 / 243

Let's proceed to step 6:
If we divide 264 by 243, we get 1 and a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 2351.0
The remainder is 21 after subtracting 243 from 264.
Take the next digit (8) from the dividend and append it to 21, then repeat: 218 / 243

On to step 7:
The number 243 fits into 218 0 times, leaving a remainder of 218.
Write down 0 as next digit of the result. 
Result so far: 23510.0
Subtracting 0 from 218 leaves us with 218.
Append the next digit (5) from the dividend to 218 and continue with: 2185 / 243

Going ahead to step 8:
2185 divided by 243 is 8 with a remainder of 241.
Put 8 as the next digit of the answer. 
Result so far: 235108.0
If we take 1944 away from 2185, we end up with 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Let's proceed to step 9:
2410 divided by 243 is 9 with a remainder of 223.
The number 9 becomes the next digit in our result. 
Result so far: 235108.9
If we take 2187 away from 2410, we end up with 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2230, and continue the process.

Let's proceed to step 10:
If we divide 2230 by 243, we get 9 and a remainder of 43.
The number 9 becomes the next digit in our result. 
Result so far: 235108.99
Deduct 2187 from 2230 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

After the division, we end up with 235108.99 and a remainder of 0.043.