861644 ÷ 24 
Our goal is to divide 861644 by 24.

Going ahead to step 1:
24 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 24

Going ahead to step 2:
24 goes into 86 3 times with a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 72 away from 86, we end up with 14.
Bring next digit (1) of the dividend behind the 14 and repeat the process: 141 / 24

Let's proceed to step 3:
If we divide 141 by 24, we get 5 and a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 35.0
Deduct 120 from 141 and we're left with 21.
Fetch the next digit (6) from the dividend, attach it to 21 and continue: 216 / 24

Step 4:
24 goes into 216 9 times with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 359.0
Deduct 216 from 216 and we're left with 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 24

Let's proceed to step 5:
4 divided by 24 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 3590.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 24

Let's proceed to step 6:
The number 24 fits into 44 1 times, leaving a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 35901.0
Subtracting 24 from 44 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 7:
If we divide 200 by 24, we get 8 and a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 35901.8
Deduct 192 from 200 and we're left 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.

Step 8:
80 divided by 24 is 3 with a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 35901.83
Deduct 72 from 80 and we're left 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.

Advancing to step 9:
24 can be fit into 80 3 times, resulting in a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 35901.833
If we take 72 away from 80, we end up 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.

The quotient of the division is 35901.833, and the remainder is 0.0008.