Let's divide 642394 by 12
We want to figure out the number of times 642394 can be divided by 12.

Step 1:
If we divide 6 by 12, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 12

Advancing to step 2:
If we divide 64 by 12, we get 5 and a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 60 away from 64, we end up with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 12

Advancing to step 3:
When dividing 42 by 12, we get 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 53.0
If we subtract 36 from 42, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 12

Advancing to step 4:
When dividing 63 by 12, we get 5 with a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 535.0
If we subtract 60 from 63, we get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 12

On to step 5:
The number 12 fits into 39 3 times, leaving a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 5353.0
The remainder is 3 after subtracting 36 from 39.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 12

On to step 6:
12 can be fit into 34 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 53532.0
Subtracting 24 from 34 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
The number 12 fits into 100 8 times, leaving a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 53532.8
If we take 96 away from 100, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
12 goes into 40 3 times with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 53532.83
Subtracting 36 from 40 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
When dividing 40 by 12, we get 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 53532.833
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 53532.833 and a remainder of 0.0004.