71481234 ÷ 21 
We want to divide 71481234 by 21.

Going ahead to step 1:
21 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 21

Going ahead to step 2:
21 can be fit into 71 3 times, resulting in a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 63 away from 71, we end up with 8.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 21

Moving on to step 3:
84 divided by 21 is 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 34.0
The remainder is 0 after subtracting 84 from 84.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 21

On to step 4:
8 divided by 21 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 340.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 21

Let's proceed to step 5:
If we divide 81 by 21, we get 3 and a remainder of 18.
The next digit of our result is 3. 
Result so far: 3403.0
If we subtract 63 from 81, we get 18.
Fetch the next digit (2) from the dividend, attach it to 18 and continue: 182 / 21

Let's proceed to step 6:
When dividing 182 by 21, we get 8 with a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 34038.0
If we take 168 away from 182, we end up with 14.
Append the next digit (3) from the dividend to 14 and continue with: 143 / 21

Moving on to step 7:
21 can be fit into 143 6 times, resulting in a remainder of 17.
The next digit of our result is 6. 
Result so far: 340386.0
The remainder is 17 after subtracting 126 from 143.
Fetch the next digit (4) from the dividend, attach it to 17 and continue: 174 / 21

Advancing to step 8:
When dividing 174 by 21, we get 8 with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 3403868.0
If we take 168 away from 174, 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 9:
60 divided by 21 is 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 3403868.2
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
The number 21 fits into 180 8 times, leaving a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 3403868.28
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.

On to step 11:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 3403868.285
If we take 105 away from 120, we end up 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.

Let's proceed to step 12:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 3403868.2857
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.

Moving on to step 13:
The number 21 fits into 30 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 3403868.28571
If we subtract 21 from 30, 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.

Advancing to step 14:
21 goes into 90 4 times with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 3403868.285714
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.

Advancing to step 15:
When dividing 60 by 21, we get 2 with a remainder of 18.
The next digit of our result is 2. 
Result so far: 3403868.2857142
If we take 42 away from 60, we end up 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 16:
180 divided by 21 is 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 3403868.28571428
If we take 168 away from 180, we end up 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.

The final result is 3403868.28571428 with a remainder of 1.2e-08.