We divide 486476 by 40
We're looking to find how many times 40 goes into 486476.

Step 1:
40 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 40

Step 2:
When dividing 48 by 40, we get 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 40 from 48 leaves us with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 40

On to step 3:
The number 40 fits into 86 2 times, leaving a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 12.0
The remainder is 6 after subtracting 80 from 86.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 40

Let's proceed to step 4:
64 divided by 40 is 1 with a remainder of 24.
The next digit of our result is 1. 
Result so far: 121.0
The remainder is 24 after subtracting 40 from 64.
Include the next digit (7) from the dividend after 24, then repeat: 247 / 40

Moving on to step 5:
40 can be fit into 247 6 times, resulting in a remainder of 7.
Use 6 as the next digit of our solution. 
Result so far: 1216.0
The remainder is 7 after subtracting 240 from 247.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 40

Going ahead to step 6:
76 divided by 40 is 1 with a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 12161.0
The remainder is 36 after subtracting 40 from 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 7:
360 divided by 40 is 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 12161.9
Subtract 360 from 360 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.

Moving on to step 8:
When dividing 0 by 40, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 12161.9
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.

Going ahead to step 9:
0 divided by 40 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 12161.9
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.

The final outcome is 12161.9, with a leftover of 0.0.