421456 divided by 19 
We want to figure out the number of times 421456 can be divided by 19.

Step 1:
19 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 19

Advancing to step 2:
The number 19 fits into 42 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 38 away from 42, we end up with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 19

Moving on to step 3:
If we divide 41 by 19, we get 2 and a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 22.0
If we subtract 38 from 41, we get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 19

Going ahead to step 4:
When dividing 34 by 19, we get 1 with a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 221.0
Subtract 19 from 34 to get 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 19

Advancing to step 5:
155 divided by 19 is 8 with a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 2218.0
If we subtract 152 from 155, we get 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 19

Advancing to step 6:
19 goes into 36 1 times with a remainder of 17.
The next digit of our result is 1. 
Result so far: 22181.0
Deduct 19 from 36 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 7:
If we divide 170 by 19, we get 8 and a remainder of 18.
The next digit of our result is 8. 
Result so far: 22181.8
The remainder is 18 after subtracting 152 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 8:
180 divided by 19 is 9 with a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 22181.89
If we subtract 171 from 180, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 9:
19 goes into 90 4 times with a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 22181.894
Deduct 76 from 90 and we're left 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.

Going ahead to step 10:
When dividing 140 by 19, we get 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 22181.8947
If we take 133 away from 140, we end up 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.

Going ahead to step 11:
70 divided by 19 is 3 with a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 22181.89473
If we subtract 57 from 70, we get 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 12:
19 can be fit into 130 6 times, resulting in a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 22181.894736
Subtracting 114 from 130 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 13:
The number 19 fits into 160 8 times, leaving a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 22181.8947368
The remainder is 8 after subtracting 152 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 14:
When dividing 80 by 19, we get 4 with a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 22181.89473684
Deduct 76 from 80 and we're left 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.

The final outcome is 22181.89473684, with a leftover of 4e-09.