We look at the division of 486453 by 51 
Let's see how many times 51 fits into 486453.

Step 1:
4 divided by 51 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 51

Going ahead to step 2:
48 divided by 51 is 0 with a remainder of 48.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 48 to get 48.
Append the next digit (6) from the dividend to 48 and continue with: 486 / 51

On to step 3:
When dividing 486 by 51, we get 9 with a remainder of 27.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtracting 459 from 486 leaves us with 27.
Include the next digit (4) from the dividend after 27, then repeat: 274 / 51

Let's proceed to step 4:
274 divided by 51 is 5 with a remainder of 19.
Put 5 as the next digit of the answer. 
Result so far: 95.0
If we subtract 255 from 274, we get 19.
Append the next digit (5) from the dividend to 19 and continue with: 195 / 51

Let's proceed to step 5:
When dividing 195 by 51, we get 3 with a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 953.0
If we subtract 153 from 195, we get 42.
Take the next digit (3) from the dividend and append it to 42, then repeat: 423 / 51

Moving on to step 6:
423 divided by 51 is 8 with a remainder of 15.
The next digit of our result is 8. 
Result so far: 9538.0
Subtracting 408 from 423 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.

Let's proceed to step 7:
The number 51 fits into 150 2 times, leaving a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 9538.2
If we subtract 102 from 150, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 8:
51 can be fit into 480 9 times, resulting in a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 9538.29
If we take 459 away from 480, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 9:
If we divide 210 by 51, we get 4 and a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 9538.294
If we take 204 away from 210, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 10:
60 divided by 51 is 1 with a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 9538.2941
Subtracting 51 from 60 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 11:
90 divided by 51 is 1 with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 9538.29411
If we subtract 51 from 90, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

After the division, we end up with 9538.29411 and a remainder of 3.9e-05.