353643 divided by 8 
Let's see how many times 8 fits into 353643.

On to step 1:
8 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 8

Moving on to step 2:
8 can be fit into 35 4 times, resulting in a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 32 from 35 and we're left with 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 8

Going ahead to step 3:
The number 8 fits into 33 4 times, leaving a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 44.0
Subtract 32 from 33 to get 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 8

Step 4:
If we divide 16 by 8, we get 2 and a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 442.0
If we take 16 away from 16, we end up with 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 8

Going ahead to step 5:
When dividing 4 by 8, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 4420.0
If we subtract 0 from 4, we get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 8

Moving on to step 6:
The number 8 fits into 43 5 times, leaving a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 44205.0
Subtract 40 from 43 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
8 can be fit into 30 3 times, resulting in a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 44205.3
Subtract 24 from 30 to get 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 8:
The number 8 fits into 60 7 times, leaving a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 44205.37
Subtracting 56 from 60 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
40 divided by 8 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 44205.375
If we subtract 40 from 40, 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.

Moving on to step 10:
0 divided by 8 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 44205.375
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.

On to step 11:
The number 8 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 44205.375
Subtract 0 from 0 to 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 44205.375 with a remainder of 0.0.