We're dividing 843583 by 40 
Our goal is to divide 843583 by 40.

Moving on to step 1:
40 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 40

Advancing to step 2:
When dividing 84 by 40, we get 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 80 from 84 and we're left with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 40

Advancing to step 3:
When dividing 43 by 40, we get 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Deduct 40 from 43 and we're left with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 40

Going ahead to step 4:
If we divide 35 by 40, we get 0 and a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 210.0
The remainder is 35 after subtracting 0 from 35.
Fetch the next digit (8) from the dividend, attach it to 35 and continue: 358 / 40

Going ahead to step 5:
358 divided by 40 is 8 with a remainder of 38.
The next digit of our result is 8. 
Result so far: 2108.0
If we subtract 320 from 358, we get 38.
Fetch the next digit (3) from the dividend, attach it to 38 and continue: 383 / 40

Moving on to step 6:
When dividing 383 by 40, we get 9 with a remainder of 23.
Write down 9 as next digit of the result. 
Result so far: 21089.0
If we subtract 360 from 383, we get 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:
40 can be fit into 230 5 times, resulting in a remainder of 30.
The next digit of our result is 5. 
Result so far: 21089.5
Subtract 200 from 230 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 8:
When dividing 300 by 40, we get 7 with a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 21089.57
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.

On to step 9:
When dividing 200 by 40, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 21089.575
Subtract 200 from 200 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.

Advancing to step 10:
40 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21089.575
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.

Let's proceed to step 11:
40 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21089.575
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.

The final outcome is 21089.575, with a leftover of 0.0.