420021 ÷ 71 
We want to figure out the number of times 420021 can be divided by 71.

Moving on to step 1:
71 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 subtract 0 from 4, we get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 71

Let's proceed to step 2:
If we divide 42 by 71, we get 0 and a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Bring next digit (0) of the dividend behind the 42 and repeat the process: 420 / 71

Moving on to step 3:
When dividing 420 by 71, we get 5 with a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
The remainder is 65 after subtracting 355 from 420.
Include the next digit (0) from the dividend after 65, then repeat: 650 / 71

Going ahead to step 4:
71 can be fit into 650 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 59.0
If we take 639 away from 650, we end up with 11.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 71

Going ahead to step 5:
The number 71 fits into 112 1 times, leaving a remainder of 41.
Write down 1 as next digit of the result. 
Result so far: 591.0
If we subtract 71 from 112, we get 41.
Fetch the next digit (1) from the dividend, attach it to 41 and continue: 411 / 71

Step 6:
If we divide 411 by 71, we get 5 and a remainder of 56.
Put 5 as the next digit of the answer. 
Result so far: 5915.0
The remainder is 56 after subtracting 355 from 411.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 7:
560 divided by 71 is 7 with a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 5915.7
The remainder is 63 after subtracting 497 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Going ahead to step 8:
71 goes into 630 8 times with a remainder of 62.
The next digit of our result is 8. 
Result so far: 5915.78
Subtracting 568 from 630 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 9:
When dividing 620 by 71, we get 8 with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 5915.788
If we take 568 away from 620, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

After the division, we end up with 5915.788 and a remainder of 0.0052.