We're dividing 139972 by 18 
We're looking to find how many times 18 goes into 139972.

Step 1:
18 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 18

Going ahead to step 2:
18 goes into 13 0 times with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 18

Moving on to step 3:
18 can be fit into 139 7 times, resulting in a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 126 from 139 leaves us with 13.
Include the next digit (9) from the dividend after 13, then repeat: 139 / 18

Let's proceed to step 4:
The number 18 fits into 139 7 times, leaving a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
The remainder is 13 after subtracting 126 from 139.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 18

Moving on to step 5:
18 goes into 137 7 times with a remainder of 11.
Write down 7 as next digit of the result. 
Result so far: 777.0
Subtract 126 from 137 to get 11.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 18

Going ahead to step 6:
18 goes into 112 6 times with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 7776.0
If we subtract 108 from 112, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
40 divided by 18 is 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 7776.2
If we take 36 away from 40, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 8:
The number 18 fits into 40 2 times, leaving a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 7776.22
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 7776.22 with a remaining 0.004.