142991 ÷ 6 
We're looking to find how many times 6 goes into 142991.

Let's proceed to step 1:
6 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 6

Let's proceed to step 2:
6 goes into 14 2 times with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 12 from 14 to get 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 6

Let's proceed to step 3:
If we divide 22 by 6, we get 3 and a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
Subtract 18 from 22 to get 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 6

Step 4:
If we divide 49 by 6, we get 8 and a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 238.0
Deduct 48 from 49 and we're left with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 6

Going ahead to step 5:
6 can be fit into 19 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 2383.0
If we subtract 18 from 19, we get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 6

Advancing to step 6:
If we divide 11 by 6, we get 1 and a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 23831.0
The remainder is 5 after subtracting 6 from 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 7:
If we divide 50 by 6, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 23831.8
Subtracting 48 from 50 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
6 can be fit into 20 3 times, resulting in a remainder of 2.
The next digit of our result is 3. 
Result so far: 23831.83
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 9:
The number 6 fits into 20 3 times, leaving a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 23831.833
If we take 18 away from 20, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 23831.833 with a remainder of 0.0002.