142912 divided by 40 
Our goal is to divide 142912 by 40.

On to step 1:
When dividing 1 by 40, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 40

Step 2:
If we divide 14 by 40, we get 0 and a remainder of 14.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 14 leaves us with 14.
Grab the next digit (2) from the dividend, add it to 14, then carry on: 142 / 40

On to step 3:
142 divided by 40 is 3 with a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 120 from 142 to get 22.
Append the next digit (9) from the dividend to 22 and continue with: 229 / 40

Advancing to step 4:
40 goes into 229 5 times with a remainder of 29.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
Subtracting 200 from 229 leaves us with 29.
Fetch the next digit (1) from the dividend, attach it to 29 and continue: 291 / 40

Step 5:
The number 40 fits into 291 7 times, leaving a remainder of 11.
The next digit of our result is 7. 
Result so far: 357.0
Subtract 280 from 291 to get 11.
Append the next digit (2) from the dividend to 11 and continue with: 112 / 40

Moving on to step 6:
112 divided by 40 is 2 with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 3572.0
Subtract 80 from 112 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 7:
40 goes into 320 8 times with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 3572.8
Subtracting 320 from 320 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.

Moving on to step 8:
The number 40 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3572.8
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.

Moving on to step 9:
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: 3572.8
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 result is 3572.8 with a remainder of 0.0.