30904256 ÷ 399 
We want to figure out the number of times 30904256 can be divided by 399.

On to step 1:
When dividing 3 by 399, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 399

Going ahead to step 2:
If we divide 30 by 399, we get 0 and a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 30, we get 30.
Grab the next digit (9) from the dividend, add it to 30, then carry on: 309 / 399

Moving on to step 3:
399 goes into 309 0 times with a remainder of 309.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 309 leaves us with 309.
Take the next digit (0) from the dividend and append it to 309, then repeat: 3090 / 399

Step 4:
If we divide 3090 by 399, we get 7 and a remainder of 297.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 2793 from 3090 and we're left with 297.
Grab the next digit (4) from the dividend, add it to 297, then carry on: 2974 / 399

Let's proceed to step 5:
399 can be fit into 2974 7 times, resulting in a remainder of 181.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
The remainder is 181 after subtracting 2793 from 2974.
Append the next digit (2) from the dividend to 181 and continue with: 1812 / 399

Moving on to step 6:
1812 divided by 399 is 4 with a remainder of 216.
Put 4 as the next digit of the answer. 
Result so far: 774.0
If we take 1596 away from 1812, we end up with 216.
Append the next digit (5) from the dividend to 216 and continue with: 2165 / 399

Advancing to step 7:
399 can be fit into 2165 5 times, resulting in a remainder of 170.
The next digit of our result is 5. 
Result so far: 7745.0
If we subtract 1995 from 2165, we get 170.
Take the next digit (6) from the dividend and append it to 170, then repeat: 1706 / 399

Advancing to step 8:
When dividing 1706 by 399, we get 4 with a remainder of 110.
Use 4 as the next digit of our solution. 
Result so far: 77454.0
If we take 1596 away from 1706, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Advancing to step 9:
When dividing 1100 by 399, we get 2 with a remainder of 302.
The number 2 becomes the next digit in our result. 
Result so far: 77454.2
Subtract 798 from 1100 to get 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Step 10:
If we divide 3020 by 399, we get 7 and a remainder of 227.
Use 7 as the next digit of our solution. 
Result so far: 77454.27
Subtracting 2793 from 3020 leaves us with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Advancing to step 11:
399 goes into 2270 5 times with a remainder of 275.
Put 5 as the next digit of the answer. 
Result so far: 77454.275
Deduct 1995 from 2270 and we're left with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Moving on to step 12:
399 can be fit into 2750 6 times, resulting in a remainder of 356.
The number 6 becomes the next digit in our result. 
Result so far: 77454.2756
Subtract 2394 from 2750 to get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Going ahead to step 13:
The number 399 fits into 3560 8 times, leaving a remainder of 368.
The number 8 becomes the next digit in our result. 
Result so far: 77454.27568
Subtracting 3192 from 3560 leaves us with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

On to step 14:
When dividing 3680 by 399, we get 9 with a remainder of 89.
The next digit of our result is 9. 
Result so far: 77454.275689
Subtract 3591 from 3680 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 15:
890 divided by 399 is 2 with a remainder of 92.
Write down 2 as next digit of the result. 
Result so far: 77454.2756892
If we subtract 798 from 890, we get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

On to step 16:
399 can be fit into 920 2 times, resulting in a remainder of 122.
Put 2 as the next digit of the answer. 
Result so far: 77454.27568922
The remainder is 122 after subtracting 798 from 920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

The final result is 77454.27568922 with a remainder of 1.22e-07.