620640 ÷ 64 
We want to divide 620640 by 64.

Moving on to step 1:
The number 64 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 64

Moving on to step 2:
If we divide 62 by 64, we get 0 and a remainder of 62.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 62, we end up with 62.
Include the next digit (0) from the dividend after 62, then repeat: 620 / 64

Moving on to step 3:
When dividing 620 by 64, we get 9 with a remainder of 44.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 576 from 620 and we're left with 44.
Include the next digit (6) from the dividend after 44, then repeat: 446 / 64

Going ahead to step 4:
446 divided by 64 is 6 with a remainder of 62.
Put 6 as the next digit of the answer. 
Result so far: 96.0
If we subtract 384 from 446, we get 62.
Take the next digit (4) from the dividend and append it to 62, then repeat: 624 / 64

Step 5:
The number 64 fits into 624 9 times, leaving a remainder of 48.
The number 9 becomes the next digit in our result. 
Result so far: 969.0
The remainder is 48 after subtracting 576 from 624.
Fetch the next digit (0) from the dividend, attach it to 48 and continue: 480 / 64

Moving on to step 6:
The number 64 fits into 480 7 times, leaving a remainder of 32.
Write down 7 as next digit of the result. 
Result so far: 9697.0
If we take 448 away from 480, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 7:
If we divide 320 by 64, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 9697.5
Deduct 320 from 320 and we're left 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.

Let's proceed to step 8:
64 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 9697.5
If we take 0 away from 0, 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.

Let's proceed to step 9:
64 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 9697.5
If we subtract 0 from 0, we get 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 outcome is 9697.5, with a leftover of 0.0.