Let's divide 30474960 by 399
Our goal is to divide 30474960 by 399.

On to step 1:
3 divided by 399 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 399

Moving on to step 2:
If we divide 30 by 399, we get 0 and a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Append the next digit (4) from the dividend to 30 and continue with: 304 / 399

Let's proceed to step 3:
399 can be fit into 304 0 times, resulting in a remainder of 304.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 304 after subtracting 0 from 304.
Take the next digit (7) from the dividend and append it to 304, then repeat: 3047 / 399

Moving on to step 4:
If we divide 3047 by 399, we get 7 and a remainder of 254.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 2793 away from 3047, we end up with 254.
Fetch the next digit (4) from the dividend, attach it to 254 and continue: 2544 / 399

Moving on to step 5:
399 can be fit into 2544 6 times, resulting in a remainder of 150.
Record the quotient 6 as the next digit in the result. 
Result so far: 76.0
Subtract 2394 from 2544 to get 150.
Take the next digit (9) from the dividend and append it to 150, then repeat: 1509 / 399

Advancing to step 6:
When dividing 1509 by 399, we get 3 with a remainder of 312.
Put 3 as the next digit of the answer. 
Result so far: 763.0
If we take 1197 away from 1509, we end up with 312.
Take the next digit (6) from the dividend and append it to 312, then repeat: 3126 / 399

On to step 7:
The number 399 fits into 3126 7 times, leaving a remainder of 333.
Write down 7 as next digit of the result. 
Result so far: 7637.0
The remainder is 333 after subtracting 2793 from 3126.
Take the next digit (0) from the dividend and append it to 333, then repeat: 3330 / 399

On to step 8:
When dividing 3330 by 399, we get 8 with a remainder of 138.
Record the quotient 8 as the next digit in the result. 
Result so far: 76378.0
The remainder is 138 after subtracting 3192 from 3330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Step 9:
If we divide 1380 by 399, we get 3 and a remainder of 183.
Put 3 as the next digit of the answer. 
Result so far: 76378.3
The remainder is 183 after subtracting 1197 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Moving on to step 10:
1830 divided by 399 is 4 with a remainder of 234.
Write down 4 as next digit of the result. 
Result so far: 76378.34
If we subtract 1596 from 1830, we get 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

On to step 11:
399 can be fit into 2340 5 times, resulting in a remainder of 345.
Put 5 as the next digit of the answer. 
Result so far: 76378.345
Deduct 1995 from 2340 and we're left with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

On to step 12:
3450 divided by 399 is 8 with a remainder of 258.
The next digit of our result is 8. 
Result so far: 76378.3458
If we take 3192 away from 3450, we end up with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Advancing to step 13:
399 can be fit into 2580 6 times, resulting in a remainder of 186.
The next digit of our result is 6. 
Result so far: 76378.34586
The remainder is 186 after subtracting 2394 from 2580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Going ahead to step 14:
The number 399 fits into 1860 4 times, leaving a remainder of 264.
Write down 4 as next digit of the result. 
Result so far: 76378.345864
The remainder is 264 after subtracting 1596 from 1860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Let's proceed to step 15:
The number 399 fits into 2640 6 times, leaving a remainder of 246.
The number 6 becomes the next digit in our result. 
Result so far: 76378.3458646
The remainder is 246 after subtracting 2394 from 2640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Going ahead to step 16:
399 goes into 2460 6 times with a remainder of 66.
Put 6 as the next digit of the answer. 
Result so far: 76378.34586466
Subtracting 2394 from 2460 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

The final outcome is 76378.34586466, with a leftover of 6.6e-08.