641828 divided by 40 
We want to figure out the number of times 641828 can be divided by 40.

Moving on to step 1:
6 divided by 40 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 40

On 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
If we take 40 away from 64, we end up with 24.
Fetch the next digit (1) from the dividend, attach it to 24 and continue: 241 / 40

Step 3:
When dividing 241 by 40, we get 6 with a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 16.0
The remainder is 1 after subtracting 240 from 241.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 40

Moving on to step 4:
If we divide 18 by 40, we get 0 and a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 160.0
If we take 0 away from 18, we end up with 18.
Include the next digit (2) from the dividend after 18, then repeat: 182 / 40

Step 5:
182 divided by 40 is 4 with a remainder of 22.
The number 4 becomes the next digit in our result. 
Result so far: 1604.0
The remainder is 22 after subtracting 160 from 182.
Take the next digit (8) from the dividend and append it to 22, then repeat: 228 / 40

On to step 6:
40 goes into 228 5 times with a remainder of 28.
Use 5 as the next digit of our solution. 
Result so far: 16045.0
The remainder is 28 after subtracting 200 from 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 7:
280 divided by 40 is 7 with a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 16045.7
If we take 280 away from 280, 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.

Moving on to step 8:
The number 40 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 16045.7
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.

On to step 9:
When dividing 0 by 40, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 16045.7
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.

Our division results in 16045.7 with a remaining 0.0.