Let's divide 642429 by 10
We want to figure out the number of times 642429 can be divided by 10.

Moving on to step 1:
10 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 10

Step 2:
10 goes into 64 6 times with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 4 after subtracting 60 from 64.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 10

On to step 3:
When dividing 42 by 10, we get 4 with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 64.0
Subtract 40 from 42 to get 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 10

On to step 4:
10 can be fit into 24 2 times, resulting in a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 642.0
Deduct 20 from 24 and we're left with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 10

On to step 5:
If we divide 42 by 10, we get 4 and a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 6424.0
Subtracting 40 from 42 leaves us with 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 10

Let's proceed to step 6:
When dividing 29 by 10, we get 2 with a remainder of 9.
The next digit of our result is 2. 
Result so far: 64242.0
If we take 20 away from 29, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
10 can be fit into 90 9 times, resulting in a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 64242.9
Subtract 90 from 90 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 8:
The number 10 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 64242.9
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:
10 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 64242.9
Subtract 0 from 0 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.

The final outcome is 64242.9, with a leftover of 0.0.