416427 divided by 21 
We're looking to find how many times 21 goes into 416427.

Advancing to step 1:
The number 21 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 21

Let's proceed to step 2:
41 divided by 21 is 1 with a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 21 from 41 to get 20.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 21

Moving on to step 3:
206 divided by 21 is 9 with a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtract 189 from 206 to get 17.
Append the next digit (4) from the dividend to 17 and continue with: 174 / 21

On to step 4:
The number 21 fits into 174 8 times, leaving a remainder of 6.
The next digit of our result is 8. 
Result so far: 198.0
Subtract 168 from 174 to get 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 21

Let's proceed to step 5:
21 goes into 62 2 times with a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 1982.0
Subtracting 42 from 62 leaves us with 20.
Bring next digit (7) of the dividend behind the 20 and repeat the process: 207 / 21

Advancing to step 6:
207 divided by 21 is 9 with a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 19829.0
The remainder is 18 after subtracting 189 from 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 7:
21 goes into 180 8 times with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 19829.8
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 8:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 19829.85
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 9:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 19829.857
Subtract 147 from 150 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 10:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 19829.8571
Subtracting 21 from 30 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 11:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 19829.85714
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 12:
60 divided by 21 is 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 19829.857142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 13:
21 goes into 180 8 times with a remainder of 12.
The next digit of our result is 8. 
Result so far: 19829.8571428
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 14:
120 divided by 21 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 19829.85714285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 19829.85714285 with a remainder of 1.5e-08.