64457507 divided by 399 
Our goal is to divide 64457507 by 399.

Moving on to step 1:
6 divided by 399 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 399

Moving on to step 2:
When dividing 64 by 399, we get 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Fetch the next digit (4) from the dividend, attach it to 64 and continue: 644 / 399

On to step 3:
If we divide 644 by 399, we get 1 and a remainder of 245.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 399 from 644 and we're left with 245.
Bring next digit (5) of the dividend behind the 245 and repeat the process: 2455 / 399

Going ahead to step 4:
The number 399 fits into 2455 6 times, leaving a remainder of 61.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
If we subtract 2394 from 2455, we get 61.
Include the next digit (7) from the dividend after 61, then repeat: 617 / 399

Advancing to step 5:
399 goes into 617 1 times with a remainder of 218.
The next digit of our result is 1. 
Result so far: 161.0
If we subtract 399 from 617, we get 218.
Grab the next digit (5) from the dividend, add it to 218, then carry on: 2185 / 399

Let's proceed to step 6:
2185 divided by 399 is 5 with a remainder of 190.
Write down 5 as next digit of the result. 
Result so far: 1615.0
If we subtract 1995 from 2185, we get 190.
Take the next digit (0) from the dividend and append it to 190, then repeat: 1900 / 399

Let's proceed to step 7:
If we divide 1900 by 399, we get 4 and a remainder of 304.
Use 4 as the next digit of our solution. 
Result so far: 16154.0
Subtracting 1596 from 1900 leaves us with 304.
Take the next digit (7) from the dividend and append it to 304, then repeat: 3047 / 399

Let's proceed to step 8:
399 goes into 3047 7 times with a remainder of 254.
Use 7 as the next digit of our solution. 
Result so far: 161547.0
If we take 2793 away from 3047, we end up with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

On to step 9:
When dividing 2540 by 399, we get 6 with a remainder of 146.
The number 6 becomes the next digit in our result. 
Result so far: 161547.6
Subtracting 2394 from 2540 leaves us with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Moving on to step 10:
399 goes into 1460 3 times with a remainder of 263.
The next digit of our result is 3. 
Result so far: 161547.63
The remainder is 263 after subtracting 1197 from 1460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2630, and continue the process.

Going ahead to step 11:
The number 399 fits into 2630 6 times, leaving a remainder of 236.
Record the quotient 6 as the next digit in the result. 
Result so far: 161547.636
If we subtract 2394 from 2630, we get 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Advancing to step 12:
2360 divided by 399 is 5 with a remainder of 365.
Write down 5 as next digit of the result. 
Result so far: 161547.6365
The remainder is 365 after subtracting 1995 from 2360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Step 13:
3650 divided by 399 is 9 with a remainder of 59.
The number 9 becomes the next digit in our result. 
Result so far: 161547.63659
The remainder is 59 after subtracting 3591 from 3650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 14:
590 divided by 399 is 1 with a remainder of 191.
Put 1 as the next digit of the answer. 
Result so far: 161547.636591
The remainder is 191 after subtracting 399 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Let's proceed to step 15:
399 can be fit into 1910 4 times, resulting in a remainder of 314.
Put 4 as the next digit of the answer. 
Result so far: 161547.6365914
Subtract 1596 from 1910 to get 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Going ahead to step 16:
If we divide 3140 by 399, we get 7 and a remainder of 347.
Use 7 as the next digit of our solution. 
Result so far: 161547.63659147
Subtract 2793 from 3140 to get 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

The quotient of the division is 161547.63659147, and the remainder is 3.47e-07.