Let's divide 486343 by 40
We want to divide 486343 by 40.

Step 1:
40 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 40

Let's proceed to step 2:
If we divide 48 by 40, we get 1 and a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 40 from 48, we get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 40

Advancing to step 3:
If we divide 86 by 40, we get 2 and a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we subtract 80 from 86, we get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 40

Going ahead to step 4:
40 can be fit into 63 1 times, resulting in a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 121.0
If we subtract 40 from 63, we get 23.
Append the next digit (4) from the dividend to 23 and continue with: 234 / 40

Step 5:
40 goes into 234 5 times with a remainder of 34.
Record the quotient 5 as the next digit in the result. 
Result so far: 1215.0
If we take 200 away from 234, we end up with 34.
Append the next digit (3) from the dividend to 34 and continue with: 343 / 40

Moving on to step 6:
When dividing 343 by 40, we get 8 with a remainder of 23.
Use 8 as the next digit of our solution. 
Result so far: 12158.0
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.

On 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: 12158.5
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.

Step 8:
40 goes into 300 7 times with a remainder of 20.
Record the quotient 7 as the next digit in the result. 
Result so far: 12158.57
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.

Let's proceed to step 9:
40 goes into 200 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 12158.575
Deduct 200 from 200 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 10:
0 divided by 40 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12158.575
If we take 0 away from 0, 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.

Step 11:
When dividing 0 by 40, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 12158.575
If we take 0 away from 0, 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.

The final outcome is 12158.575, with a leftover of 0.0.