399946 ÷ 64 
We're looking to find how many times 64 goes into 399946.

Step 1:
If we divide 3 by 64, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 64

On to step 2:
When dividing 39 by 64, we get 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Take the next digit (9) from the dividend and append it to 39, then repeat: 399 / 64

On to step 3:
399 divided by 64 is 6 with a remainder of 15.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtract 384 from 399 to get 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 64

Step 4:
When dividing 159 by 64, we get 2 with a remainder of 31.
Put 2 as the next digit of the answer. 
Result so far: 62.0
Subtracting 128 from 159 leaves us with 31.
Append the next digit (4) from the dividend to 31 and continue with: 314 / 64

On to step 5:
When dividing 314 by 64, we get 4 with a remainder of 58.
Write down 4 as next digit of the result. 
Result so far: 624.0
Subtracting 256 from 314 leaves us with 58.
Fetch the next digit (6) from the dividend, attach it to 58 and continue: 586 / 64

Step 6:
If we divide 586 by 64, we get 9 and a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 6249.0
If we take 576 away from 586, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
The number 64 fits into 100 1 times, leaving a remainder of 36.
Write down 1 as next digit of the result. 
Result so far: 6249.1
Subtract 64 from 100 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 8:
64 goes into 360 5 times with a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 6249.15
The remainder is 40 after subtracting 320 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 9:
When dividing 400 by 64, we get 6 with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 6249.156
Deduct 384 from 400 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
The number 64 fits into 160 2 times, leaving a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 6249.1562
If we take 128 away from 160, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 11:
The number 64 fits into 320 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6249.15625
Deduct 320 from 320 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.

Step 12:
The number 64 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 6249.15625
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.

Let's proceed to step 13:
The number 64 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 6249.15625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 6249.15625 with a balance of 0.0.