We look at the division of 645567 by 1 
We want to divide 645567 by 1.

Step 1:
1 goes into 6 6 times with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtracting 6 from 6 leaves us with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 1

Let's proceed to step 2:
4 divided by 1 is 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 64.0
The remainder is 0 after subtracting 4 from 4.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 1

Step 3:
When dividing 5 by 1, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 645.0
Deduct 5 from 5 and we're left with 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 1

On to step 4:
If we divide 5 by 1, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6455.0
Deduct 5 from 5 and we're left with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 1

Going ahead to step 5:
The number 1 fits into 6 6 times, leaving a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 64556.0
If we subtract 6 from 6, we get 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 1

Advancing to step 6:
1 can be fit into 7 7 times, resulting in a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 645567.0
Deduct 7 from 7 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.

Let's proceed to step 7:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 645567.0
If we subtract 0 from 0, 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.

Step 8:
0 divided by 1 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 645567.0
If we subtract 0 from 0, 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.

In conclusion, the division gives 645567.0 with a balance of 0.0.