19047 ÷ 21 
We want to figure out the number of times 19047 can be divided by 21.

Advancing to step 1:
The number 21 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 21

On to step 2:
21 goes into 19 0 times with a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 19 and we're left with 19.
Include the next digit (0) from the dividend after 19, then repeat: 190 / 21

On to step 3:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 1 after subtracting 189 from 190.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 21

Moving on to step 4:
14 divided by 21 is 0 with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
If we subtract 0 from 14, we get 14.
Include the next digit (7) from the dividend after 14, then repeat: 147 / 21

Moving on to step 5:
When dividing 147 by 21, we get 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 907.0
If we take 147 away from 147, 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.

On to step 6:
When dividing 0 by 21, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 907.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
When dividing 0 by 21, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 907.0
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.

The final result is 907.0 with a remainder of 0.0.