We look at the division of 616991 by 16 
We're looking to find how many times 16 goes into 616991.

Step 1:
If we divide 6 by 16, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 16

On to step 2:
When dividing 61 by 16, we get 3 with a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 48 from 61 to get 13.
Append the next digit (6) from the dividend to 13 and continue with: 136 / 16

Advancing to step 3:
16 can be fit into 136 8 times, resulting in a remainder of 8.
The next digit of our result is 8. 
Result so far: 38.0
The remainder is 8 after subtracting 128 from 136.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 16

Step 4:
16 can be fit into 89 5 times, resulting in a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 385.0
If we subtract 80 from 89, we get 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 16

Let's proceed to step 5:
99 divided by 16 is 6 with a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 3856.0
Deduct 96 from 99 and we're left with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 16

Step 6:
When dividing 31 by 16, we get 1 with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 38561.0
Subtracting 16 from 31 leaves us 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.

Moving on to step 7:
The number 16 fits into 150 9 times, leaving a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 38561.9
The remainder is 6 after subtracting 144 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
16 goes into 60 3 times with a remainder of 12.
The next digit of our result is 3. 
Result so far: 38561.93
The remainder is 12 after subtracting 48 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
16 can be fit into 120 7 times, resulting in a remainder of 8.
Record the quotient 7 as the next digit in the result. 
Result so far: 38561.937
The remainder is 8 after subtracting 112 from 120.
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:
The number 16 fits into 80 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 38561.9375
Subtracting 80 from 80 leaves us 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 11:
0 divided by 16 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 38561.9375
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.

Moving on to step 12:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 38561.9375
Subtract 0 from 0 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.

The final outcome is 38561.9375, with a leftover of 0.0.