451989 ÷ 8 
We want to figure out the number of times 451989 can be divided by 8.

Let's proceed to step 1:
8 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 8

Going ahead to step 2:
When dividing 45 by 8, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 40 from 45 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 8

Going ahead to step 3:
The number 8 fits into 51 6 times, leaving a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 56.0
Subtract 48 from 51 to get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 8

Let's proceed to step 4:
The number 8 fits into 39 4 times, leaving a remainder of 7.
The number 4 becomes the next digit in our result. 
Result so far: 564.0
Deduct 32 from 39 and we're left with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 8

Going ahead to step 5:
78 divided by 8 is 9 with a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 5649.0
If we subtract 72 from 78, we get 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 8

Advancing to step 6:
8 goes into 69 8 times with a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 56498.0
Subtract 64 from 69 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
If we divide 50 by 8, we get 6 and a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 56498.6
If we subtract 48 from 50, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
20 divided by 8 is 2 with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 56498.62
Subtract 16 from 20 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
If we divide 40 by 8, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 56498.625
If we take 40 away from 40, 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 10:
If we divide 0 by 8, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 56498.625
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.

Step 11:
The number 8 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 56498.625
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.

The quotient of the division is 56498.625, and the remainder is 0.0.