We look at the division of 420180 by 19 
Let's see how many times 19 fits into 420180.

Moving on to step 1:
When dividing 4 by 19, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 19

Let's proceed to step 2:
If we divide 42 by 19, we get 2 and a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 38 from 42 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 19

Moving on to step 3:
The number 19 fits into 40 2 times, leaving a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
If we subtract 38 from 40, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 19

Let's proceed to step 4:
19 can be fit into 21 1 times, resulting in a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 221.0
The remainder is 2 after subtracting 19 from 21.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 19

Moving on to step 5:
When dividing 28 by 19, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 2211.0
If we take 19 away from 28, we end up with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 19

Going ahead to step 6:
If we divide 90 by 19, we get 4 and a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 22114.0
If we take 76 away from 90, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 7:
If we divide 140 by 19, we get 7 and a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 22114.7
Deduct 133 from 140 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
19 goes into 70 3 times with a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 22114.73
Subtracting 57 from 70 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 9:
130 divided by 19 is 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 22114.736
The remainder is 16 after subtracting 114 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
19 goes into 160 8 times with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 22114.7368
If we subtract 152 from 160, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 11:
The number 19 fits into 80 4 times, leaving a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 22114.73684
If we take 76 away from 80, 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.

Moving on to step 12:
19 goes into 40 2 times with a remainder of 2.
The next digit of our result is 2. 
Result so far: 22114.736842
Subtract 38 from 40 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.

Advancing to step 13:
The number 19 fits into 20 1 times, leaving a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 22114.7368421
If we subtract 19 from 20, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 14:
10 divided by 19 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 22114.7368421
Deduct 0 from 10 and we're left 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.

After the division, we end up with 22114.7368421 and a remainder of 1e-08.