We divide 30171 by 42
We're looking to find how many times 42 goes into 30171.

Step 1:
42 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 42

Going ahead to step 2:
When dividing 30 by 42, we get 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Grab the next digit (1) from the dividend, add it to 30, then carry on: 301 / 42

Let's proceed to step 3:
301 divided by 42 is 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 294 from 301 leaves us with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 42

Let's proceed to step 4:
42 goes into 77 1 times with a remainder of 35.
Record the quotient 1 as the next digit in the result. 
Result so far: 71.0
Subtracting 42 from 77 leaves us with 35.
Bring next digit (1) of the dividend behind the 35 and repeat the process: 351 / 42

Moving on to step 5:
When dividing 351 by 42, we get 8 with a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 718.0
Subtracting 336 from 351 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 6:
When dividing 150 by 42, we get 3 with a remainder of 24.
Record the quotient 3 as the next digit in the result. 
Result so far: 718.3
If we subtract 126 from 150, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 7:
42 can be fit into 240 5 times, resulting in a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 718.35
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.

Advancing to step 8:
42 can be fit into 300 7 times, resulting in a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 718.357
Deduct 294 from 300 and we're left 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 9:
42 goes into 60 1 times with a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 718.3571
If we subtract 42 from 60, we 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.

On to step 10:
When dividing 180 by 42, we get 4 with a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 718.35714
Subtract 168 from 180 to 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 11:
When dividing 120 by 42, we get 2 with a remainder of 36.
The number 2 becomes the next digit in our result. 
Result so far: 718.357142
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.

Step 12:
The number 42 fits into 360 8 times, leaving a remainder of 24.
The next digit of our result is 8. 
Result so far: 718.3571428
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.

Let's proceed to step 13:
When dividing 240 by 42, we get 5 with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 718.35714285
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.

In conclusion, the division gives 718.35714285 with a balance of 3e-08.