We're dividing 387270 by 42 
Let's see how many times 42 fits into 387270.

Going ahead to step 1:
When dividing 3 by 42, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 42

On to step 2:
42 goes into 38 0 times with a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 38, we get 38.
Fetch the next digit (7) from the dividend, attach it to 38 and continue: 387 / 42

Advancing to step 3:
When dividing 387 by 42, we get 9 with a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we subtract 378 from 387, we get 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 42

Going ahead to step 4:
If we divide 92 by 42, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 92.0
Subtracting 84 from 92 leaves us with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 42

Going ahead to step 5:
42 goes into 87 2 times with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 922.0
Subtracting 84 from 87 leaves us with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 42

Moving on to step 6:
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: 9220.0
If we take 0 away from 30, we end up 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.

Moving on to step 7:
42 can be fit into 300 7 times, resulting in a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 9220.7
If we subtract 294 from 300, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
60 divided by 42 is 1 with a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 9220.71
Subtracting 42 from 60 leaves us 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.

On to step 9:
42 goes into 180 4 times with a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 9220.714
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.

Advancing to step 10:
42 can be fit into 120 2 times, resulting in a remainder of 36.
Put 2 as the next digit of the answer. 
Result so far: 9220.7142
Deduct 84 from 120 and we're left 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.

On to step 11:
When dividing 360 by 42, we get 8 with a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 9220.71428
Subtract 336 from 360 to 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.

Going ahead to step 12:
If we divide 240 by 42, we get 5 and a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 9220.714285
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.

On to step 13:
If we divide 300 by 42, we get 7 and a remainder of 6.
The next digit of our result is 7. 
Result so far: 9220.7142857
Subtract 294 from 300 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 14:
60 divided by 42 is 1 with a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 9220.71428571
Deduct 42 from 60 and we're left 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.

The final result is 9220.71428571 with a remainder of 1.8e-08.