143286 ÷ 40 
We want to divide 143286 by 40.

Advancing to step 1:
When dividing 1 by 40, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 40

Going ahead to step 2:
If we divide 14 by 40, we get 0 and a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 14 and we're left with 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 40

Advancing to step 3:
The number 40 fits into 143 3 times, leaving a remainder of 23.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 120 from 143, we get 23.
Take the next digit (2) from the dividend and append it to 23, then repeat: 232 / 40

Let's proceed to step 4:
40 goes into 232 5 times with a remainder of 32.
Put 5 as the next digit of the answer. 
Result so far: 35.0
The remainder is 32 after subtracting 200 from 232.
Bring next digit (8) of the dividend behind the 32 and repeat the process: 328 / 40

Let's proceed to step 5:
40 goes into 328 8 times with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 358.0
Subtract 320 from 328 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 40

Going ahead to step 6:
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: 3582.0
Subtract 80 from 86 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
40 goes into 60 1 times with a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 3582.1
Deduct 40 from 60 and we're left 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 8:
200 divided by 40 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 3582.15
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.

Step 9:
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: 3582.15
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.

On to step 10:
If we divide 0 by 40, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3582.15
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.

After the division, we end up with 3582.15 and a remainder of 0.0.