We divide 429439 by 40
We want to figure out the number of times 429439 can be divided by 40.

Moving on to step 1:
The number 40 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 40

Let's proceed to step 2:
The number 40 fits into 42 1 times, leaving a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
If we take 40 away from 42, we end up with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 40

Moving on to step 3:
If we divide 29 by 40, we get 0 and a remainder of 29.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 29, we end up with 29.
Fetch the next digit (4) from the dividend, attach it to 29 and continue: 294 / 40

Advancing to step 4:
40 goes into 294 7 times with a remainder of 14.
The next digit of our result is 7. 
Result so far: 107.0
The remainder is 14 after subtracting 280 from 294.
Bring next digit (3) of the dividend behind the 14 and repeat the process: 143 / 40

Step 5:
When dividing 143 by 40, we get 3 with a remainder of 23.
Use 3 as the next digit of our solution. 
Result so far: 1073.0
Subtracting 120 from 143 leaves us with 23.
Include the next digit (9) from the dividend after 23, then repeat: 239 / 40

Advancing to step 6:
239 divided by 40 is 5 with a remainder of 39.
Use 5 as the next digit of our solution. 
Result so far: 10735.0
If we take 200 away from 239, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 7:
40 goes into 390 9 times with a remainder of 30.
The next digit of our result is 9. 
Result so far: 10735.9
The remainder is 30 after subtracting 360 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to 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: 10735.97
If we take 280 away from 300, we end up 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:
200 divided by 40 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 10735.975
Subtracting 200 from 200 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.

Step 10:
40 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10735.975
Deduct 0 from 0 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.

Advancing to step 11:
0 divided by 40 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10735.975
Subtracting 0 from 0 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.

Our division results in 10735.975 with a remaining 0.0.