We divide 20644640 by 71
We're looking to find how many times 71 goes into 20644640.

On to step 1:
If we divide 2 by 71, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 71

Going ahead to step 2:
71 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Take the next digit (6) from the dividend and append it to 20, then repeat: 206 / 71

Moving on to step 3:
When dividing 206 by 71, we get 2 with a remainder of 64.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 64 after subtracting 142 from 206.
Grab the next digit (4) from the dividend, add it to 64, then carry on: 644 / 71

Step 4:
The number 71 fits into 644 9 times, leaving a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 29.0
The remainder is 5 after subtracting 639 from 644.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 71

Going ahead to step 5:
The number 71 fits into 54 0 times, leaving a remainder of 54.
Record the quotient 0 as the next digit in the result. 
Result so far: 290.0
Subtracting 0 from 54 leaves us with 54.
Include the next digit (6) from the dividend after 54, then repeat: 546 / 71

Advancing to step 6:
If we divide 546 by 71, we get 7 and a remainder of 49.
The number 7 becomes the next digit in our result. 
Result so far: 2907.0
Subtract 497 from 546 to get 49.
Include the next digit (4) from the dividend after 49, then repeat: 494 / 71

On to step 7:
The number 71 fits into 494 6 times, leaving a remainder of 68.
Write down 6 as next digit of the result. 
Result so far: 29076.0
The remainder is 68 after subtracting 426 from 494.
Fetch the next digit (0) from the dividend, attach it to 68 and continue: 680 / 71

Going ahead to step 8:
680 divided by 71 is 9 with a remainder of 41.
The next digit of our result is 9. 
Result so far: 290769.0
Deduct 639 from 680 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 9:
The number 71 fits into 410 5 times, leaving a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 290769.5
Subtract 355 from 410 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 10:
71 can be fit into 550 7 times, resulting in a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 290769.57
If we subtract 497 from 550, we get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

On to step 11:
When dividing 530 by 71, we get 7 with a remainder of 33.
Use 7 as the next digit of our solution. 
Result so far: 290769.577
Deduct 497 from 530 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

The final outcome is 290769.577, with a leftover of 0.0033.