486354 ÷ 4 
Let's see how many times 4 fits into 486354.

Step 1:
If we divide 4 by 4, we get 1 and a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 4 from 4 leaves us with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 4

Moving on to step 2:
The number 4 fits into 8 2 times, leaving a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 8 away from 8, we end up with 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 4

Step 3:
4 can be fit into 6 1 times, resulting in a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 121.0
If we subtract 4 from 6, we get 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 4

Going ahead to step 4:
When dividing 23 by 4, we get 5 with a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 1215.0
The remainder is 3 after subtracting 20 from 23.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 4

Step 5:
The number 4 fits into 35 8 times, leaving a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 12158.0
Subtract 32 from 35 to get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 4

Going ahead to step 6:
4 can be fit into 34 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 121588.0
If we take 32 away from 34, we end up with 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 7:
The number 4 fits into 20 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 121588.5
If we subtract 20 from 20, we 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.

Going ahead to step 8:
The number 4 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 121588.5
If we subtract 0 from 0, we 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.

Advancing to step 9:
When dividing 0 by 4, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 121588.5
If we subtract 0 from 0, we 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 result is 121588.5 with a remainder of 0.0.