1644869 ÷ 355 
Let's see how many times 355 fits into 1644869.

Going ahead to step 1:
The number 355 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 355

On to step 2:
If we divide 16 by 355, we get 0 and a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 16, we get 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 355

On to step 3:
164 divided by 355 is 0 with a remainder of 164.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 164, we get 164.
Include the next digit (4) from the dividend after 164, then repeat: 1644 / 355

On to step 4:
If we divide 1644 by 355, we get 4 and a remainder of 224.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 1420 from 1644 and we're left with 224.
Take the next digit (8) from the dividend and append it to 224, then repeat: 2248 / 355

Moving on to step 5:
355 can be fit into 2248 6 times, resulting in a remainder of 118.
Put 6 as the next digit of the answer. 
Result so far: 46.0
Deduct 2130 from 2248 and we're left with 118.
Include the next digit (6) from the dividend after 118, then repeat: 1186 / 355

Advancing to step 6:
355 goes into 1186 3 times with a remainder of 121.
The next digit of our result is 3. 
Result so far: 463.0
The remainder is 121 after subtracting 1065 from 1186.
Append the next digit (9) from the dividend to 121 and continue with: 1219 / 355

Moving on to step 7:
If we divide 1219 by 355, we get 3 and a remainder of 154.
Put 3 as the next digit of the answer. 
Result so far: 4633.0
The remainder is 154 after subtracting 1065 from 1219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Step 8:
If we divide 1540 by 355, we get 4 and a remainder of 120.
Write down 4 as next digit of the result. 
Result so far: 4633.4
Subtracting 1420 from 1540 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 9:
When dividing 1200 by 355, we get 3 with a remainder of 135.
The number 3 becomes the next digit in our result. 
Result so far: 4633.43
Subtracting 1065 from 1200 leaves us with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Advancing to step 10:
355 goes into 1350 3 times with a remainder of 285.
The next digit of our result is 3. 
Result so far: 4633.433
Deduct 1065 from 1350 and we're left with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Our division results in 4633.433 with a remaining 0.0285.