Let's divide 353645 by 86
Let's see how many times 86 fits into 353645.

Step 1:
The number 86 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 86

Advancing to step 2:
When dividing 35 by 86, we get 0 with a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 35, we get 35.
Append the next digit (3) from the dividend to 35 and continue with: 353 / 86

Advancing to step 3:
If we divide 353 by 86, we get 4 and a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 344 from 353 and we're left with 9.
Include the next digit (6) from the dividend after 9, then repeat: 96 / 86

Let's proceed to step 4:
When dividing 96 by 86, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 41.0
If we subtract 86 from 96, we get 10.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 86

On to step 5:
When dividing 104 by 86, we get 1 with a remainder of 18.
The next digit of our result is 1. 
Result so far: 411.0
If we subtract 86 from 104, we get 18.
Take the next digit (5) from the dividend and append it to 18, then repeat: 185 / 86

On to step 6:
The number 86 fits into 185 2 times, leaving a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 4112.0
If we take 172 away from 185, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
86 can be fit into 130 1 times, resulting in a remainder of 44.
Put 1 as the next digit of the answer. 
Result so far: 4112.1
Deduct 86 from 130 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 8:
When dividing 440 by 86, we get 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 4112.15
If we take 430 away from 440, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
The number 86 fits into 100 1 times, leaving a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 4112.151
Subtracting 86 from 100 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 10:
If we divide 140 by 86, we get 1 and a remainder of 54.
Use 1 as the next digit of our solution. 
Result so far: 4112.1511
The remainder is 54 after subtracting 86 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final outcome is 4112.1511, with a leftover of 0.00054.