We divide 399153 by 30
We want to figure out the number of times 399153 can be divided by 30.

Advancing to step 1:
30 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 30

Step 2:
30 can be fit into 39 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 30 from 39 and we're left with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 30

On to step 3:
30 goes into 99 3 times with a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtract 90 from 99 to get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 30

Advancing to step 4:
If we divide 91 by 30, we get 3 and a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 133.0
If we take 90 away from 91, we end up with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 30

Let's proceed to step 5:
30 goes into 15 0 times with a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 1330.0
Subtracting 0 from 15 leaves us with 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 30

Advancing to step 6:
The number 30 fits into 153 5 times, leaving a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 13305.0
Subtracting 150 from 153 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
30 can be fit into 30 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 13305.1
Deduct 30 from 30 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
When dividing 0 by 30, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 13305.1
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
If we divide 0 by 30, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 13305.1
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 13305.1 with a remainder of 0.0.