We're dividing 158599 by 42 
We're looking to find how many times 42 goes into 158599.

Let's proceed to step 1:
The number 42 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 42

Step 2:
When dividing 15 by 42, we get 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 42

Advancing to step 3:
158 divided by 42 is 3 with a remainder of 32.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 126 from 158 leaves us with 32.
Append the next digit (5) from the dividend to 32 and continue with: 325 / 42

Going ahead to step 4:
The number 42 fits into 325 7 times, leaving a remainder of 31.
Put 7 as the next digit of the answer. 
Result so far: 37.0
Subtracting 294 from 325 leaves us with 31.
Grab the next digit (9) from the dividend, add it to 31, then carry on: 319 / 42

Moving on to step 5:
319 divided by 42 is 7 with a remainder of 25.
Record the quotient 7 as the next digit in the result. 
Result so far: 377.0
Subtracting 294 from 319 leaves us with 25.
Grab the next digit (9) from the dividend, add it to 25, then carry on: 259 / 42

Going ahead to step 6:
259 divided by 42 is 6 with a remainder of 7.
Put 6 as the next digit of the answer. 
Result so far: 3776.0
Deduct 252 from 259 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
42 can be fit into 70 1 times, resulting in a remainder of 28.
Record the quotient 1 as the next digit in the result. 
Result so far: 3776.1
Deduct 42 from 70 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 8:
The number 42 fits into 280 6 times, leaving a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 3776.16
Subtract 252 from 280 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 9:
280 divided by 42 is 6 with a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 3776.166
Subtracting 252 from 280 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Our division results in 3776.166 with a remaining 0.0028.