We look at the division of 143658 by 42 
Our goal is to divide 143658 by 42.

Advancing to step 1:
The number 42 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 42

Let's proceed to step 2:
If we divide 14 by 42, we get 0 and a remainder of 14.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 14 and we're left with 14.
Include the next digit (3) from the dividend after 14, then repeat: 143 / 42

On to step 3:
42 goes into 143 3 times with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 126 from 143 leaves us with 17.
Bring next digit (6) of the dividend behind the 17 and repeat the process: 176 / 42

Advancing to step 4:
42 goes into 176 4 times with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 34.0
Subtract 168 from 176 to get 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 42

On to step 5:
The number 42 fits into 85 2 times, leaving a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 342.0
If we take 84 away from 85, we end up with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 42

Step 6:
If we divide 18 by 42, we get 0 and a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 3420.0
If we take 0 away from 18, we end up with 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 number 4 becomes the next digit in our result. 
Result so far: 3420.4
Deduct 168 from 180 and we're left with 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:
42 can be fit into 120 2 times, resulting in a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 3420.42
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.

Going ahead to step 9:
42 can be fit into 360 8 times, resulting in a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 3420.428
If we take 336 away from 360, we end up 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.

Advancing to step 10:
42 goes into 240 5 times with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 3420.4285
Subtracting 210 from 240 leaves us 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.

Going ahead to step 11:
The number 42 fits into 300 7 times, leaving a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 3420.42857
The remainder is 6 after subtracting 294 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 12:
When dividing 60 by 42, we get 1 with a remainder of 18.
The next digit of our result is 1. 
Result so far: 3420.428571
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.

Let's proceed to step 13:
The number 42 fits into 180 4 times, leaving a remainder of 12.
The next digit of our result is 4. 
Result so far: 3420.4285714
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.

Let's proceed to step 14:
120 divided by 42 is 2 with a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 3420.42857142
If we take 84 away from 120, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

After the division, we end up with 3420.42857142 and a remainder of 3.6e-08.