We look at the division of 21407 by 10 
Our goal is to divide 21407 by 10.

Let's proceed to step 1:
10 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 10

Going ahead to step 2:
10 can be fit into 21 2 times, resulting in a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 20 from 21, we get 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 10

Moving on to step 3:
If we divide 14 by 10, we get 1 and a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 21.0
The remainder is 4 after subtracting 10 from 14.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 10

Advancing to step 4:
If we divide 40 by 10, we get 4 and a remainder of 0.
The next digit of our result is 4. 
Result so far: 214.0
Deduct 40 from 40 and we're left with 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 10

Advancing to step 5:
10 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 2140.0
Subtracting 0 from 7 leaves us 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.

Moving on to step 6:
10 goes into 70 7 times with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 2140.7
If we take 70 away from 70, 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.

Going ahead to step 7:
0 divided by 10 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 2140.7
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 8:
0 divided by 10 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2140.7
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 result is 2140.7 with a remainder of 0.0.