399890 ÷ 33 
We want to figure out the number of times 399890 can be divided by 33.

Step 1:
If we divide 3 by 33, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 33

Moving on to step 2:
33 can be fit into 39 1 times, resulting in a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 33 from 39 to get 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 33

Going ahead to step 3:
When dividing 69 by 33, we get 2 with a remainder of 3.
The next digit of our result is 2. 
Result so far: 12.0
Subtracting 66 from 69 leaves us with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 33

Moving on to step 4:
33 goes into 38 1 times with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 121.0
Deduct 33 from 38 and we're left with 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 33

On to step 5:
The number 33 fits into 59 1 times, leaving a remainder of 26.
Put 1 as the next digit of the answer. 
Result so far: 1211.0
Subtract 33 from 59 to get 26.
Grab the next digit (0) from the dividend, add it to 26, then carry on: 260 / 33

Advancing to step 6:
33 can be fit into 260 7 times, resulting in a remainder of 29.
The next digit of our result is 7. 
Result so far: 12117.0
The remainder is 29 after subtracting 231 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 7:
33 can be fit into 290 8 times, resulting in a remainder of 26.
Put 8 as the next digit of the answer. 
Result so far: 12117.8
Subtracting 264 from 290 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 8:
When dividing 260 by 33, we get 7 with a remainder of 29.
Use 7 as the next digit of our solution. 
Result so far: 12117.87
The remainder is 29 after subtracting 231 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 9:
33 can be fit into 290 8 times, resulting in a remainder of 26.
Put 8 as the next digit of the answer. 
Result so far: 12117.878
If we subtract 264 from 290, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 10:
If we divide 260 by 33, we get 7 and a remainder of 29.
Use 7 as the next digit of our solution. 
Result so far: 12117.8787
Deduct 231 from 260 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 11:
The number 33 fits into 290 8 times, leaving a remainder of 26.
Put 8 as the next digit of the answer. 
Result so far: 12117.87878
If we take 264 away from 290, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 12:
If we divide 260 by 33, we get 7 and a remainder of 29.
Put 7 as the next digit of the answer. 
Result so far: 12117.878787
Subtract 231 from 260 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 13:
If we divide 290 by 33, we get 8 and a remainder of 26.
Use 8 as the next digit of our solution. 
Result so far: 12117.8787878
The remainder is 26 after subtracting 264 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 14:
33 can be fit into 260 7 times, resulting in a remainder of 29.
Write down 7 as next digit of the result. 
Result so far: 12117.87878787
The remainder is 29 after subtracting 231 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

After the division, we end up with 12117.87878787 and a remainder of 2.9e-08.