We divide 644954 by 1
We want to divide 644954 by 1.

Moving on to step 1:
When dividing 6 by 1, we get 6 with a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 6 from 6 to get 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 1

Moving on to step 2:
If we divide 4 by 1, we get 4 and a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 64.0
If we subtract 4 from 4, we get 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 1

Moving on to step 3:
The number 1 fits into 4 4 times, leaving a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 644.0
Subtract 4 from 4 to get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 1

On to step 4:
When dividing 9 by 1, we get 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 6449.0
If we take 9 away from 9, we end up with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 1

Moving on to step 5:
The number 1 fits into 5 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 64495.0
If we take 5 away from 5, we end up with 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 1

On to step 6:
1 goes into 4 4 times with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 644954.0
If we subtract 4 from 4, we 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.

Let's proceed to step 7:
When dividing 0 by 1, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 644954.0
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.

Moving on to step 8:
When dividing 0 by 1, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 644954.0
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.

Our division results in 644954.0 with a remaining 0.0.