Let's divide 138742 by 20
We want to figure out the number of times 138742 can be divided by 20.

Step 1:
1 divided by 20 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 20

Step 2:
13 divided by 20 is 0 with a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 20

Moving on to step 3:
20 can be fit into 138 6 times, resulting in a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 120 away from 138, we end up with 18.
Include the next digit (7) from the dividend after 18, then repeat: 187 / 20

Going ahead to step 4:
When dividing 187 by 20, we get 9 with a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 69.0
If we take 180 away from 187, we end up with 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 20

Moving on to step 5:
20 can be fit into 74 3 times, resulting in a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 693.0
If we take 60 away from 74, we end up with 14.
Take the next digit (2) from the dividend and append it to 14, then repeat: 142 / 20

Going ahead to step 6:
When dividing 142 by 20, we get 7 with a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 6937.0
Subtracting 140 from 142 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 7:
The number 20 fits into 20 1 times, leaving a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 6937.1
The remainder is 0 after subtracting 20 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6937.1
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 6937.1
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 6937.1, with a leftover of 0.0.