243186 ÷ 31 
Our goal is to divide 243186 by 31.

Advancing to step 1:
When dividing 2 by 31, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 31

Step 2:
The number 31 fits into 24 0 times, leaving a remainder of 24.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 24, we end up with 24.
Fetch the next digit (3) from the dividend, attach it to 24 and continue: 243 / 31

Let's proceed to step 3:
If we divide 243 by 31, we get 7 and a remainder of 26.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 217 from 243 leaves us with 26.
Include the next digit (1) from the dividend after 26, then repeat: 261 / 31

On to step 4:
The number 31 fits into 261 8 times, leaving a remainder of 13.
Write down 8 as next digit of the result. 
Result so far: 78.0
Deduct 248 from 261 and we're left with 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 31

Moving on to step 5:
If we divide 138 by 31, we get 4 and a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 784.0
The remainder is 14 after subtracting 124 from 138.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 31

On to step 6:
31 goes into 146 4 times with a remainder of 22.
Record the quotient 4 as the next digit in the result. 
Result so far: 7844.0
Subtracting 124 from 146 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 7:
The number 31 fits into 220 7 times, leaving a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 7844.7
Subtracting 217 from 220 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 8:
31 can be fit into 30 0 times, resulting in a remainder of 30.
The next digit of our result is 0. 
Result so far: 7844.7
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
31 goes into 300 9 times with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 7844.709
If we subtract 279 from 300, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 10:
210 divided by 31 is 6 with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 7844.7096
Subtract 186 from 210 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 11:
When dividing 240 by 31, we get 7 with a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 7844.70967
Subtract 217 from 240 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 12:
When dividing 230 by 31, we get 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 7844.709677
Subtract 217 from 230 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Our division results in 7844.709677 with a remaining 1.3e-06.