139901 divided by 18 
We're looking to find how many times 18 goes into 139901.

Going ahead to step 1:
18 goes into 1 0 times with 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.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 18

Moving on to step 2:
When dividing 13 by 18, we get 0 with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Grab the next digit (9) from the dividend, add it to 13, then carry on: 139 / 18

Going ahead to step 3:
18 goes into 139 7 times with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtract 126 from 139 to get 13.
Bring next digit (9) of the dividend behind the 13 and repeat the process: 139 / 18

Step 4:
The number 18 fits into 139 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 77.0
The remainder is 13 after subtracting 126 from 139.
Fetch the next digit (0) from the dividend, attach it to 13 and continue: 130 / 18

Going ahead to step 5:
18 can be fit into 130 7 times, resulting in a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 777.0
If we subtract 126 from 130, we get 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 18

On to step 6:
If we divide 41 by 18, we get 2 and a remainder of 5.
The next digit of our result is 2. 
Result so far: 7772.0
Subtract 36 from 41 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
When dividing 50 by 18, we get 2 with a remainder of 14.
The number 2 becomes the next digit in our result. 
Result so far: 7772.2
If we subtract 36 from 50, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 8:
When dividing 140 by 18, we get 7 with a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 7772.27
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 9:
The number 18 fits into 140 7 times, leaving a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 7772.277
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 7772.277 with a remainder of 0.0014.