We're dividing 646405 by 50 
We want to divide 646405 by 50.

Let's proceed to step 1:
The number 50 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 50

On to step 2:
When dividing 64 by 50, we get 1 with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 14 after subtracting 50 from 64.
Grab the next digit (6) from the dividend, add it to 14, then carry on: 146 / 50

Advancing to step 3:
The number 50 fits into 146 2 times, leaving a remainder of 46.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 46 after subtracting 100 from 146.
Take the next digit (4) from the dividend and append it to 46, then repeat: 464 / 50

Let's proceed to step 4:
50 goes into 464 9 times with a remainder of 14.
The number 9 becomes the next digit in our result. 
Result so far: 129.0
Subtract 450 from 464 to get 14.
Append the next digit (0) from the dividend to 14 and continue with: 140 / 50

Advancing to step 5:
When dividing 140 by 50, we get 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 1292.0
If we take 100 away from 140, we end up with 40.
Append the next digit (5) from the dividend to 40 and continue with: 405 / 50

On to step 6:
50 goes into 405 8 times with a remainder of 5.
The number 8 becomes the next digit in our result. 
Result so far: 12928.0
Subtracting 400 from 405 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 7:
50 can be fit into 50 1 times, resulting in a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 12928.1
Subtracting 50 from 50 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.

On to step 8:
If we divide 0 by 50, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 12928.1
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.

Advancing to step 9:
0 divided by 50 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 12928.1
Deduct 0 from 0 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.

The final outcome is 12928.1, with a leftover of 0.0.