We divide 644592 by 40
We're looking to find how many times 40 goes into 644592.

Going ahead to step 1:
40 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 40

Going ahead to step 2:
The number 40 fits into 64 1 times, leaving a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 40 from 64 and we're left with 24.
Fetch the next digit (4) from the dividend, attach it to 24 and continue: 244 / 40

Advancing to step 3:
If we divide 244 by 40, we get 6 and a remainder of 4.
The next digit of our result is 6. 
Result so far: 16.0
Subtract 240 from 244 to get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 40

Moving on to step 4:
40 can be fit into 45 1 times, resulting in a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 161.0
Deduct 40 from 45 and we're left with 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 40

Advancing to step 5:
If we divide 59 by 40, we get 1 and a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 1611.0
The remainder is 19 after subtracting 40 from 59.
Include the next digit (2) from the dividend after 19, then repeat: 192 / 40

Moving on to step 6:
192 divided by 40 is 4 with a remainder of 32.
Use 4 as the next digit of our solution. 
Result so far: 16114.0
The remainder is 32 after subtracting 160 from 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 7:
If we divide 320 by 40, we get 8 and a remainder of 0.
The next digit of our result is 8. 
Result so far: 16114.8
Deduct 320 from 320 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 8:
If we divide 0 by 40, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16114.8
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.

Moving on to step 9:
The number 40 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 16114.8
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.

In conclusion, the division gives 16114.8 with a balance of 0.0.