We look at the division of 643546 by 2 
We're looking to find how many times 2 goes into 643546.

Going ahead to step 1:
2 goes into 6 3 times with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 6 from 6 and we're left with 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 2

Let's proceed to step 2:
2 can be fit into 4 2 times, resulting in a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 32.0
Subtracting 4 from 4 leaves us with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 2

On to step 3:
2 goes into 3 1 times with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 321.0
If we subtract 2 from 3, we get 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 2

Let's proceed to step 4:
When dividing 15 by 2, we get 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 3217.0
If we subtract 14 from 15, we get 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 2

Going ahead to step 5:
14 divided by 2 is 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 32177.0
Subtract 14 from 14 to get 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 2

Let's proceed to step 6:
If we divide 6 by 2, we get 3 and a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 321773.0
Subtract 6 from 6 to get 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 7:
0 divided by 2 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 321773.0
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.

Step 8:
0 divided by 2 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 321773.0
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.

The quotient of the division is 321773.0, and the remainder is 0.0.