Let's divide 17881758 by 646
We want to figure out the number of times 17881758 can be divided by 646.

Going ahead to step 1:
If we divide 1 by 646, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 646

Step 2:
646 can be fit into 17 0 times, resulting in a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Take the next digit (8) from the dividend and append it to 17, then repeat: 178 / 646

Let's proceed to step 3:
When dividing 178 by 646, we get 0 with a remainder of 178.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 178, we end up with 178.
Take the next digit (8) from the dividend and append it to 178, then repeat: 1788 / 646

Let's proceed to step 4:
1788 divided by 646 is 2 with a remainder of 496.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 1292 from 1788 and we're left with 496.
Take the next digit (1) from the dividend and append it to 496, then repeat: 4961 / 646

On to step 5:
4961 divided by 646 is 7 with a remainder of 439.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Deduct 4522 from 4961 and we're left with 439.
Take the next digit (7) from the dividend and append it to 439, then repeat: 4397 / 646

Advancing to step 6:
The number 646 fits into 4397 6 times, leaving a remainder of 521.
Record the quotient 6 as the next digit in the result. 
Result so far: 276.0
If we subtract 3876 from 4397, we get 521.
Take the next digit (5) from the dividend and append it to 521, then repeat: 5215 / 646

Step 7:
The number 646 fits into 5215 8 times, leaving a remainder of 47.
Use 8 as the next digit of our solution. 
Result so far: 2768.0
Subtracting 5168 from 5215 leaves us with 47.
Grab the next digit (8) from the dividend, add it to 47, then carry on: 478 / 646

Moving on to step 8:
646 can be fit into 478 0 times, resulting in a remainder of 478.
Use 0 as the next digit of our solution. 
Result so far: 27680.0
If we subtract 0 from 478, we get 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Step 9:
If we divide 4780 by 646, we get 7 and a remainder of 258.
Write down 7 as next digit of the result. 
Result so far: 27680.7
Deduct 4522 from 4780 and we're left with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Moving on to step 10:
646 can be fit into 2580 3 times, resulting in a remainder of 642.
Record the quotient 3 as the next digit in the result. 
Result so far: 27680.73
Subtract 1938 from 2580 to get 642.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6420, and continue the process.

Going ahead to step 11:
The number 646 fits into 6420 9 times, leaving a remainder of 606.
Write down 9 as next digit of the result. 
Result so far: 27680.739
The remainder is 606 after subtracting 5814 from 6420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

Moving on to step 12:
646 goes into 6060 9 times with a remainder of 246.
The number 9 becomes the next digit in our result. 
Result so far: 27680.7399
Subtracting 5814 from 6060 leaves us with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

The final result is 27680.7399 with a remainder of 0.00246.