We're dividing 390170 by 33 
We want to figure out the number of times 390170 can be divided by 33.

On to step 1:
When dividing 3 by 33, we get 0 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 (9) from the dividend, add it to 3, then carry on: 39 / 33

On to step 2:
The number 33 fits into 39 1 times, leaving a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 33 from 39 leaves us with 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 33

Step 3:
60 divided by 33 is 1 with a remainder of 27.
The next digit of our result is 1. 
Result so far: 11.0
Deduct 33 from 60 and we're left with 27.
Grab the next digit (1) from the dividend, add it to 27, then carry on: 271 / 33

Advancing to step 4:
The number 33 fits into 271 8 times, leaving a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 118.0
The remainder is 7 after subtracting 264 from 271.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 33

Going ahead to step 5:
The number 33 fits into 77 2 times, leaving a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 1182.0
The remainder is 11 after subtracting 66 from 77.
Include the next digit (0) from the dividend after 11, then repeat: 110 / 33

Advancing to step 6:
33 goes into 110 3 times with a remainder of 11.
The next digit of our result is 3. 
Result so far: 11823.0
Subtract 99 from 110 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
33 goes into 110 3 times with a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 11823.3
Deduct 99 from 110 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 8:
If we divide 110 by 33, we get 3 and a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 11823.33
Subtracting 99 from 110 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The final result is 11823.33 with a remainder of 0.011.