1283673 divided by 646 
Our goal is to divide 1283673 by 646.

Let's proceed to step 1:
When dividing 1 by 646, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 646

Advancing to step 2:
12 divided by 646 is 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 646

Step 3:
646 can be fit into 128 0 times, resulting in a remainder of 128.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 128 leaves us with 128.
Fetch the next digit (3) from the dividend, attach it to 128 and continue: 1283 / 646

Advancing to step 4:
1283 divided by 646 is 1 with a remainder of 637.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 646 from 1283, we get 637.
Bring next digit (6) of the dividend behind the 637 and repeat the process: 6376 / 646

Advancing to step 5:
When dividing 6376 by 646, we get 9 with a remainder of 562.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 5814 from 6376 leaves us with 562.
Append the next digit (7) from the dividend to 562 and continue with: 5627 / 646

Going ahead to step 6:
646 can be fit into 5627 8 times, resulting in a remainder of 459.
Record the quotient 8 as the next digit in the result. 
Result so far: 198.0
Subtracting 5168 from 5627 leaves us with 459.
Grab the next digit (3) from the dividend, add it to 459, then carry on: 4593 / 646

Step 7:
646 can be fit into 4593 7 times, resulting in a remainder of 71.
Use 7 as the next digit of our solution. 
Result so far: 1987.0
Subtract 4522 from 4593 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Going ahead to step 8:
646 can be fit into 710 1 times, resulting in a remainder of 64.
Write down 1 as next digit of the result. 
Result so far: 1987.1
The remainder is 64 after subtracting 646 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 9:
The number 646 fits into 640 0 times, leaving a remainder of 640.
Put 0 as the next digit of the answer. 
Result so far: 1987.1
Subtracting 0 from 640 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Moving on to step 10:
If we divide 6400 by 646, we get 9 and a remainder of 586.
Record the quotient 9 as the next digit in the result. 
Result so far: 1987.109
Subtract 5814 from 6400 to get 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Going ahead to step 11:
646 goes into 5860 9 times with a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 1987.1099
If we take 5814 away from 5860, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final outcome is 1987.1099, with a leftover of 0.00046.