We're dividing 18781418 by 646 
We want to figure out the number of times 18781418 can be divided by 646.

Advancing to step 1:
The number 646 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 646

Going ahead to step 2:
646 goes into 18 0 times with a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Append the next digit (7) from the dividend to 18 and continue with: 187 / 646

Going ahead to step 3:
The number 646 fits into 187 0 times, leaving a remainder of 187.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 187 and we're left with 187.
Grab the next digit (8) from the dividend, add it to 187, then carry on: 1878 / 646

Going ahead to step 4:
1878 divided by 646 is 2 with a remainder of 586.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 1292 from 1878, we get 586.
Grab the next digit (1) from the dividend, add it to 586, then carry on: 5861 / 646

Going ahead to step 5:
The number 646 fits into 5861 9 times, leaving a remainder of 47.
Put 9 as the next digit of the answer. 
Result so far: 29.0
The remainder is 47 after subtracting 5814 from 5861.
Bring next digit (4) of the dividend behind the 47 and repeat the process: 474 / 646

On to step 6:
The number 646 fits into 474 0 times, leaving a remainder of 474.
The next digit of our result is 0. 
Result so far: 290.0
The remainder is 474 after subtracting 0 from 474.
Take the next digit (1) from the dividend and append it to 474, then repeat: 4741 / 646

Advancing to step 7:
646 can be fit into 4741 7 times, resulting in a remainder of 219.
Write down 7 as next digit of the result. 
Result so far: 2907.0
The remainder is 219 after subtracting 4522 from 4741.
Append the next digit (8) from the dividend to 219 and continue with: 2198 / 646

Moving on to step 8:
The number 646 fits into 2198 3 times, leaving a remainder of 260.
Write down 3 as next digit of the result. 
Result so far: 29073.0
The remainder is 260 after subtracting 1938 from 2198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 9:
When dividing 2600 by 646, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 29073.4
If we take 2584 away from 2600, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
When dividing 160 by 646, we get 0 with a remainder of 160.
Use 0 as the next digit of our solution. 
Result so far: 29073.4
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 11:
646 can be fit into 1600 2 times, resulting in a remainder of 308.
Use 2 as the next digit of our solution. 
Result so far: 29073.402
Subtract 1292 from 1600 to get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Going ahead to step 12:
646 can be fit into 3080 4 times, resulting in a remainder of 496.
The number 4 becomes the next digit in our result. 
Result so far: 29073.4024
The remainder is 496 after subtracting 2584 from 3080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Moving on to step 13:
If we divide 4960 by 646, we get 7 and a remainder of 438.
Use 7 as the next digit of our solution. 
Result so far: 29073.40247
If we take 4522 away from 4960, we end up with 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Moving on to step 14:
The number 646 fits into 4380 6 times, leaving a remainder of 504.
Put 6 as the next digit of the answer. 
Result so far: 29073.402476
If we take 3876 away from 4380, we end up with 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

On to step 15:
The number 646 fits into 5040 7 times, leaving a remainder of 518.
Record the quotient 7 as the next digit in the result. 
Result so far: 29073.4024767
Deduct 4522 from 5040 and we're left with 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Advancing to step 16:
The number 646 fits into 5180 8 times, leaving a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 29073.40247678
If we take 5168 away from 5180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 29073.40247678 with a remainder of 1.2e-08.