446309 ÷ 87 
Our goal is to divide 446309 by 87.

Let's proceed to step 1:
The number 87 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 87

Going ahead to step 2:
When dividing 44 by 87, we get 0 with a remainder of 44.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 44 to get 44.
Append the next digit (6) from the dividend to 44 and continue with: 446 / 87

Going ahead to step 3:
When dividing 446 by 87, we get 5 with a remainder of 11.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 435 from 446 to get 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 87

Step 4:
113 divided by 87 is 1 with a remainder of 26.
Put 1 as the next digit of the answer. 
Result so far: 51.0
If we take 87 away from 113, we end up with 26.
Include the next digit (0) from the dividend after 26, then repeat: 260 / 87

Moving on to step 5:
87 goes into 260 2 times with a remainder of 86.
Put 2 as the next digit of the answer. 
Result so far: 512.0
Deduct 174 from 260 and we're left with 86.
Grab the next digit (9) from the dividend, add it to 86, then carry on: 869 / 87

Moving on to step 6:
87 can be fit into 869 9 times, resulting in a remainder of 86.
Write down 9 as next digit of the result. 
Result so far: 5129.0
The remainder is 86 after subtracting 783 from 869.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 7:
87 goes into 860 9 times with a remainder of 77.
Write down 9 as next digit of the result. 
Result so far: 5129.9
The remainder is 77 after subtracting 783 from 860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 8:
87 can be fit into 770 8 times, resulting in a remainder of 74.
Put 8 as the next digit of the answer. 
Result so far: 5129.98
If we take 696 away from 770, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 9:
The number 87 fits into 740 8 times, leaving a remainder of 44.
Write down 8 as next digit of the result. 
Result so far: 5129.988
If we subtract 696 from 740, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final outcome is 5129.988, with a leftover of 0.0044.