We divide 100343 by 40
We want to figure out the number of times 100343 can be divided by 40.

On to step 1:
If we divide 1 by 40, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 40

Moving on to step 2:
The number 40 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 10, we get 10.
Fetch the next digit (0) from the dividend, attach it to 10 and continue: 100 / 40

Moving on to step 3:
If we divide 100 by 40, we get 2 and a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 80 from 100 to get 20.
Include the next digit (3) from the dividend after 20, then repeat: 203 / 40

On to step 4:
If we divide 203 by 40, we get 5 and a remainder of 3.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Subtracting 200 from 203 leaves us with 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 40

Advancing to step 5:
When dividing 34 by 40, we get 0 with a remainder of 34.
The number 0 becomes the next digit in our result. 
Result so far: 250.0
The remainder is 34 after subtracting 0 from 34.
Include the next digit (3) from the dividend after 34, then repeat: 343 / 40

Advancing to step 6:
If we divide 343 by 40, we get 8 and a remainder of 23.
Use 8 as the next digit of our solution. 
Result so far: 2508.0
Deduct 320 from 343 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 7:
If we divide 230 by 40, we get 5 and a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 2508.5
Deduct 200 from 230 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
300 divided by 40 is 7 with a remainder of 20.
The next digit of our result is 7. 
Result so far: 2508.57
Subtracting 280 from 300 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
If we divide 200 by 40, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 2508.575
Subtracting 200 from 200 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.

Advancing to step 10:
40 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 2508.575
The remainder is 0 after subtracting 0 from 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 11:
40 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 2508.575
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 2508.575 with a remaining 0.0.