243870 ÷ 31 
Our goal is to divide 243870 by 31.

Advancing to step 1:
31 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
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 31

Moving on to step 2:
31 goes into 24 0 times with a remainder of 24.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 24 leaves us with 24.
Append the next digit (3) from the dividend to 24 and continue with: 243 / 31

On to step 3:
31 can be fit into 243 7 times, resulting in a remainder of 26.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Deduct 217 from 243 and we're left with 26.
Grab the next digit (8) from the dividend, add it to 26, then carry on: 268 / 31

Let's proceed to step 4:
31 can be fit into 268 8 times, resulting in a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 78.0
Deduct 248 from 268 and we're left with 20.
Take the next digit (7) from the dividend and append it to 20, then repeat: 207 / 31

Let's proceed to step 5:
The number 31 fits into 207 6 times, leaving a remainder of 21.
Put 6 as the next digit of the answer. 
Result so far: 786.0
If we subtract 186 from 207, we get 21.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 31

Going ahead to step 6:
31 can be fit into 210 6 times, resulting in a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 7866.0
Subtracting 186 from 210 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 7:
31 goes into 240 7 times with a remainder of 23.
Use 7 as the next digit of our solution. 
Result so far: 7866.7
The remainder is 23 after subtracting 217 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 8:
If we divide 230 by 31, we get 7 and a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 7866.77
If we take 217 away from 230, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 7866.77 with a remainder of 0.013.