We look at the division of 138509 by 66 
Our goal is to divide 138509 by 66.

Step 1:
If we divide 1 by 66, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 66

On to step 2:
66 can be fit into 13 0 times, resulting in a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 66

Let's proceed to step 3:
66 can be fit into 138 2 times, resulting in a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 132 from 138 leaves us with 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 66

On to step 4:
65 divided by 66 is 0 with a remainder of 65.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Subtract 0 from 65 to get 65.
Bring next digit (0) of the dividend behind the 65 and repeat the process: 650 / 66

On to step 5:
66 goes into 650 9 times with a remainder of 56.
Write down 9 as next digit of the result. 
Result so far: 209.0
Deduct 594 from 650 and we're left with 56.
Bring next digit (9) of the dividend behind the 56 and repeat the process: 569 / 66

On to step 6:
When dividing 569 by 66, we get 8 with a remainder of 41.
Record the quotient 8 as the next digit in the result. 
Result so far: 2098.0
Subtract 528 from 569 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 7:
When dividing 410 by 66, we get 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 2098.6
Subtract 396 from 410 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.

On to step 8:
66 goes into 140 2 times with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 2098.62
Deduct 132 from 140 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
If we divide 80 by 66, we get 1 and a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 2098.621
If we take 66 away from 80, 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.

Going ahead to step 10:
When dividing 140 by 66, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 2098.6212
If we subtract 132 from 140, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 11:
66 goes into 80 1 times with a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 2098.62121
If we take 66 away from 80, 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.

Going ahead to step 12:
66 goes into 140 2 times with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 2098.621212
Subtract 132 from 140 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 13:
The number 66 fits into 80 1 times, leaving a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 2098.6212121
Subtract 66 from 80 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.

Advancing to step 14:
The number 66 fits into 140 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 2098.62121212
Deduct 132 from 140 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 2098.62121212, and the remainder is 8e-09.