1643499 divided by 391 
Let's see how many times 391 fits into 1643499.

Step 1:
391 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 391

Going ahead to step 2:
When dividing 16 by 391, we get 0 with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Include the next digit (4) from the dividend after 16, then repeat: 164 / 391

Step 3:
The number 391 fits into 164 0 times, leaving a remainder of 164.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 164, we get 164.
Append the next digit (3) from the dividend to 164 and continue with: 1643 / 391

Going ahead to step 4:
If we divide 1643 by 391, we get 4 and a remainder of 79.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 1564 from 1643, we get 79.
Fetch the next digit (4) from the dividend, attach it to 79 and continue: 794 / 391

Going ahead to step 5:
794 divided by 391 is 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtract 782 from 794 to get 12.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 391

Going ahead to step 6:
The number 391 fits into 129 0 times, leaving a remainder of 129.
The number 0 becomes the next digit in our result. 
Result so far: 420.0
The remainder is 129 after subtracting 0 from 129.
Include the next digit (9) from the dividend after 129, then repeat: 1299 / 391

Advancing to step 7:
The number 391 fits into 1299 3 times, leaving a remainder of 126.
Record the quotient 3 as the next digit in the result. 
Result so far: 4203.0
Subtract 1173 from 1299 to get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Let's proceed to step 8:
When dividing 1260 by 391, we get 3 with a remainder of 87.
The next digit of our result is 3. 
Result so far: 4203.3
The remainder is 87 after subtracting 1173 from 1260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Step 9:
870 divided by 391 is 2 with a remainder of 88.
Record the quotient 2 as the next digit in the result. 
Result so far: 4203.32
If we subtract 782 from 870, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Advancing to step 10:
If we divide 880 by 391, we get 2 and a remainder of 98.
The next digit of our result is 2. 
Result so far: 4203.322
Subtracting 782 from 880 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

The quotient of the division is 4203.322, and the remainder is 0.0098.