68291509 divided by 399 
Our goal is to divide 68291509 by 399.

Going ahead to step 1:
If we divide 6 by 399, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 399

Moving on to step 2:
399 goes into 68 0 times with a remainder of 68.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Append the next digit (2) from the dividend to 68 and continue with: 682 / 399

Moving on to step 3:
399 goes into 682 1 times with a remainder of 283.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 399 from 682 leaves us with 283.
Grab the next digit (9) from the dividend, add it to 283, then carry on: 2839 / 399

Advancing to step 4:
2839 divided by 399 is 7 with a remainder of 46.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we subtract 2793 from 2839, we get 46.
Fetch the next digit (1) from the dividend, attach it to 46 and continue: 461 / 399

Going ahead to step 5:
If we divide 461 by 399, we get 1 and a remainder of 62.
Record the quotient 1 as the next digit in the result. 
Result so far: 171.0
The remainder is 62 after subtracting 399 from 461.
Bring next digit (5) of the dividend behind the 62 and repeat the process: 625 / 399

Advancing to step 6:
399 can be fit into 625 1 times, resulting in a remainder of 226.
Put 1 as the next digit of the answer. 
Result so far: 1711.0
Subtracting 399 from 625 leaves us with 226.
Append the next digit (0) from the dividend to 226 and continue with: 2260 / 399

Advancing to step 7:
If we divide 2260 by 399, we get 5 and a remainder of 265.
The next digit of our result is 5. 
Result so far: 17115.0
Subtract 1995 from 2260 to get 265.
Take the next digit (9) from the dividend and append it to 265, then repeat: 2659 / 399

Moving on to step 8:
The number 399 fits into 2659 6 times, leaving a remainder of 265.
The number 6 becomes the next digit in our result. 
Result so far: 171156.0
The remainder is 265 after subtracting 2394 from 2659.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

On to step 9:
The number 399 fits into 2650 6 times, leaving a remainder of 256.
Use 6 as the next digit of our solution. 
Result so far: 171156.6
Subtracting 2394 from 2650 leaves us with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Step 10:
399 goes into 2560 6 times with a remainder of 166.
The number 6 becomes the next digit in our result. 
Result so far: 171156.66
Deduct 2394 from 2560 and we're left with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

The final outcome is 171156.66, with a leftover of 0.166.