661569 ÷ 16 
We want to divide 661569 by 16.

Let's proceed to step 1:
16 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 16

Step 2:
If we divide 66 by 16, we get 4 and a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 4.0
The remainder is 2 after subtracting 64 from 66.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 16

Let's proceed to step 3:
16 goes into 21 1 times with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 41.0
Deduct 16 from 21 and we're left with 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 16

Step 4:
If we divide 55 by 16, we get 3 and a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 413.0
Subtracting 48 from 55 leaves us with 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 16

Moving on to step 5:
When dividing 76 by 16, we get 4 with a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 4134.0
Deduct 64 from 76 and we're left with 12.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 16

Going ahead to step 6:
The number 16 fits into 129 8 times, leaving a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 41348.0
If we take 128 away from 129, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
The number 16 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 41348.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
The number 16 fits into 100 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 41348.06
The remainder is 4 after subtracting 96 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
40 divided by 16 is 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 41348.062
Subtracting 32 from 40 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 10:
80 divided by 16 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 41348.0625
If we take 80 away from 80, 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.

Step 11:
0 divided by 16 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 41348.0625
Subtracting 0 from 0 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.

Moving on to step 12:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 41348.0625
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.

After the division, we end up with 41348.0625 and a remainder of 0.0.