621939 divided by 16 
Our goal is to divide 621939 by 16.

Let's proceed to step 1:
If we divide 6 by 16, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 16

Advancing to step 2:
If we divide 62 by 16, we get 3 and a remainder of 14.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 14 after subtracting 48 from 62.
Include the next digit (1) from the dividend after 14, then repeat: 141 / 16

Let's proceed to step 3:
16 can be fit into 141 8 times, resulting in a remainder of 13.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
If we subtract 128 from 141, we get 13.
Bring next digit (9) of the dividend behind the 13 and repeat the process: 139 / 16

Going ahead to step 4:
16 can be fit into 139 8 times, resulting in a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 388.0
If we subtract 128 from 139, we get 11.
Take the next digit (3) from the dividend and append it to 11, then repeat: 113 / 16

Going ahead to step 5:
16 can be fit into 113 7 times, resulting in a remainder of 1.
The next digit of our result is 7. 
Result so far: 3887.0
If we take 112 away from 113, we end up with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 16

Step 6:
When dividing 19 by 16, we get 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 38871.0
If we subtract 16 from 19, we 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.

Advancing to step 7:
16 can be fit into 30 1 times, resulting in a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 38871.1
Subtract 16 from 30 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 8:
When dividing 140 by 16, we get 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 38871.18
The remainder is 12 after subtracting 128 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
The number 16 fits into 120 7 times, leaving a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 38871.187
Subtract 112 from 120 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.

Let's proceed to step 10:
When dividing 80 by 16, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 38871.1875
Deduct 80 from 80 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 11:
When dividing 0 by 16, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 38871.1875
Deduct 0 from 0 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.

Advancing to step 12:
16 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 38871.1875
Deduct 0 from 0 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.

In conclusion, the division gives 38871.1875 with a balance of 0.0.