We divide 621661 by 16
We want to figure out the number of times 621661 can be divided by 16.

Step 1:
If we divide 6 by 16, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 16

Going ahead to step 2:
16 goes into 62 3 times with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 48 from 62, we get 14.
Take the next digit (1) from the dividend and append it to 14, then repeat: 141 / 16

Let's proceed to step 3:
141 divided by 16 is 8 with a remainder of 13.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Subtract 128 from 141 to get 13.
Bring next digit (6) of the dividend behind the 13 and repeat the process: 136 / 16

Going ahead to step 4:
The number 16 fits into 136 8 times, leaving a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 388.0
Subtracting 128 from 136 leaves us with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 16

Moving on to step 5:
16 goes into 86 5 times with a remainder of 6.
The next digit of our result is 5. 
Result so far: 3885.0
Deduct 80 from 86 and we're left with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 16

Going ahead to step 6:
16 can be fit into 61 3 times, resulting in a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 38853.0
Subtract 48 from 61 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 7:
16 can be fit into 130 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 38853.8
Deduct 128 from 130 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 8:
16 can be fit into 20 1 times, resulting in a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 38853.81
Deduct 16 from 20 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
If we divide 40 by 16, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 38853.812
Subtract 32 from 40 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
If we divide 80 by 16, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 38853.8125
Subtract 80 from 80 to 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.

Moving on to step 11:
0 divided by 16 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 38853.8125
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 12:
The number 16 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 38853.8125
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 38853.8125 with a remaining 0.0.