We're dividing 420112 by 5 
We want to figure out the number of times 420112 can be divided by 5.

On to step 1:
The number 5 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 5

Going ahead to step 2:
If we divide 42 by 5, we get 8 and a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 40 from 42, we get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 5

Let's proceed to step 3:
20 divided by 5 is 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 84.0
If we take 20 away from 20, we end up with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 5

Advancing to step 4:
5 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 840.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 5

Let's proceed to step 5:
If we divide 11 by 5, we get 2 and a remainder of 1.
The next digit of our result is 2. 
Result so far: 8402.0
The remainder is 1 after subtracting 10 from 11.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 5

Moving on to step 6:
If we divide 12 by 5, we get 2 and a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 84022.0
Subtract 10 from 12 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
5 can be fit into 20 4 times, resulting in a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 84022.4
Subtracting 20 from 20 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.

Let's proceed to step 8:
When dividing 0 by 5, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 84022.4
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 9:
If we divide 0 by 5, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 84022.4
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.

The final outcome is 84022.4, with a leftover of 0.0.