139089 divided by 18 
We want to figure out the number of times 139089 can be divided by 18.

On to step 1:
1 divided by 18 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 18

Going ahead to step 2:
18 goes into 13 0 times with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Grab the next digit (9) from the dividend, add it to 13, then carry on: 139 / 18

Going ahead to step 3:
The number 18 fits into 139 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 126 from 139 to get 13.
Bring next digit (0) of the dividend behind the 13 and repeat the process: 130 / 18

Step 4:
18 can be fit into 130 7 times, resulting in a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 77.0
Deduct 126 from 130 and we're left with 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 18

Going ahead to step 5:
When dividing 48 by 18, we get 2 with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 772.0
The remainder is 12 after subtracting 36 from 48.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 18

Moving on to step 6:
The number 18 fits into 129 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 7727.0
Subtract 126 from 129 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
When dividing 30 by 18, we get 1 with a remainder of 12.
The next digit of our result is 1. 
Result so far: 7727.1
Subtract 18 from 30 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 8:
18 goes into 120 6 times with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 7727.16
If we subtract 108 from 120, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
If we divide 120 by 18, we get 6 and a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 7727.166
Subtract 108 from 120 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The quotient of the division is 7727.166, and the remainder is 0.0012.