We look at the division of 170524 by 42 
Let's see how many times 42 fits into 170524.

Step 1:
When dividing 1 by 42, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 42

Step 2:
42 goes into 17 0 times with a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Take the next digit (0) from the dividend and append it to 17, then repeat: 170 / 42

On to step 3:
The number 42 fits into 170 4 times, leaving a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtract 168 from 170 to get 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 42

On to step 4:
When dividing 25 by 42, we get 0 with a remainder of 25.
The next digit of our result is 0. 
Result so far: 40.0
The remainder is 25 after subtracting 0 from 25.
Bring next digit (2) of the dividend behind the 25 and repeat the process: 252 / 42

Let's proceed to step 5:
42 goes into 252 6 times with a remainder of 0.
The next digit of our result is 6. 
Result so far: 406.0
The remainder is 0 after subtracting 252 from 252.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 42

Let's proceed to step 6:
If we divide 4 by 42, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 4060.0
Subtracting 0 from 4 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
If we divide 40 by 42, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 4060.0
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
The number 42 fits into 400 9 times, leaving a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 4060.09
Deduct 378 from 400 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 9:
When dividing 220 by 42, we get 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 4060.095
If we take 210 away from 220, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
The number 42 fits into 100 2 times, leaving a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 4060.0952
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
42 can be fit into 160 3 times, resulting in a remainder of 34.
The next digit of our result is 3. 
Result so far: 4060.09523
Subtract 126 from 160 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 12:
The number 42 fits into 340 8 times, leaving a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 4060.095238
Subtract 336 from 340 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 13:
If we divide 40 by 42, we get 0 and a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 4060.095238
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 14:
400 divided by 42 is 9 with a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 4060.09523809
If we subtract 378 from 400, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final result is 4060.09523809 with a remainder of 2.2e-08.