615644 ÷ 1 
We're looking to find how many times 1 goes into 615644.

Advancing to step 1:
When dividing 6 by 1, we get 6 with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 6 from 6 and we're left with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

On to step 2:
1 can be fit into 1 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 61.0
Subtracting 1 from 1 leaves us with 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 1

Advancing to step 3:
5 divided by 1 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 615.0
Deduct 5 from 5 and we're left with 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 1

On to step 4:
If we divide 6 by 1, we get 6 and a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 6156.0
If we subtract 6 from 6, we get 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 1

Moving on to step 5:
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: 61564.0
Subtracting 4 from 4 leaves us with 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 1

On to step 6:
1 goes into 4 4 times with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 615644.0
If we take 4 away from 4, we end up 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.

Going ahead to step 7:
If we divide 0 by 1, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 615644.0
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.

Advancing to step 8:
1 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 615644.0
Subtract 0 from 0 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.

The final outcome is 615644.0, with a leftover of 0.0.