Let's divide 138996 by 42
Our goal is to divide 138996 by 42.

On to step 1:
1 divided by 42 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 42

Let's proceed to step 2:
The number 42 fits into 13 0 times, leaving a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 42

Step 3:
138 divided by 42 is 3 with a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 126 from 138 and we're left with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 42

On to step 4:
If we divide 129 by 42, we get 3 and a remainder of 3.
The next digit of our result is 3. 
Result so far: 33.0
The remainder is 3 after subtracting 126 from 129.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 42

Let's proceed to step 5:
If we divide 39 by 42, we get 0 and a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 330.0
Subtracting 0 from 39 leaves us with 39.
Take the next digit (6) from the dividend and append it to 39, then repeat: 396 / 42

Moving on to step 6:
The number 42 fits into 396 9 times, leaving a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 3309.0
Subtract 378 from 396 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
42 goes into 180 4 times with a remainder of 12.
The next digit of our result is 4. 
Result so far: 3309.4
If we subtract 168 from 180, 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.

Step 8:
When dividing 120 by 42, we get 2 with a remainder of 36.
Put 2 as the next digit of the answer. 
Result so far: 3309.42
Subtract 84 from 120 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 9:
360 divided by 42 is 8 with a remainder of 24.
The next digit of our result is 8. 
Result so far: 3309.428
Deduct 336 from 360 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 10:
42 goes into 240 5 times with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 3309.4285
Deduct 210 from 240 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
42 goes into 300 7 times with a remainder of 6.
The next digit of our result is 7. 
Result so far: 3309.42857
If we take 294 away from 300, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 12:
42 goes into 60 1 times with a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 3309.428571
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 13:
180 divided by 42 is 4 with a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 3309.4285714
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 14:
When dividing 120 by 42, we get 2 with a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 3309.42857142
If we subtract 84 from 120, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The quotient of the division is 3309.42857142, and the remainder is 3.6e-08.