18813702 ÷ 643 
We want to figure out the number of times 18813702 can be divided by 643.

Advancing to step 1:
643 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 643

Step 2:
18 divided by 643 is 0 with a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Append the next digit (8) from the dividend to 18 and continue with: 188 / 643

Going ahead to step 3:
188 divided by 643 is 0 with a remainder of 188.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 188 and we're left with 188.
Fetch the next digit (1) from the dividend, attach it to 188 and continue: 1881 / 643

On to step 4:
If we divide 1881 by 643, we get 2 and a remainder of 595.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 595 after subtracting 1286 from 1881.
Take the next digit (3) from the dividend and append it to 595, then repeat: 5953 / 643

Let's proceed to step 5:
When dividing 5953 by 643, we get 9 with a remainder of 166.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
If we subtract 5787 from 5953, we get 166.
Take the next digit (7) from the dividend and append it to 166, then repeat: 1667 / 643

Let's proceed to step 6:
The number 643 fits into 1667 2 times, leaving a remainder of 381.
The next digit of our result is 2. 
Result so far: 292.0
Deduct 1286 from 1667 and we're left with 381.
Fetch the next digit (0) from the dividend, attach it to 381 and continue: 3810 / 643

Moving on to step 7:
The number 643 fits into 3810 5 times, leaving a remainder of 595.
The next digit of our result is 5. 
Result so far: 2925.0
The remainder is 595 after subtracting 3215 from 3810.
Append the next digit (2) from the dividend to 595 and continue with: 5952 / 643

Advancing to step 8:
643 goes into 5952 9 times with a remainder of 165.
The number 9 becomes the next digit in our result. 
Result so far: 29259.0
Deduct 5787 from 5952 and we're left with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

On to step 9:
1650 divided by 643 is 2 with a remainder of 364.
Use 2 as the next digit of our solution. 
Result so far: 29259.2
Subtract 1286 from 1650 to get 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Going ahead to step 10:
If we divide 3640 by 643, we get 5 and a remainder of 425.
Put 5 as the next digit of the answer. 
Result so far: 29259.25
Deduct 3215 from 3640 and we're left with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

On to step 11:
The number 643 fits into 4250 6 times, leaving a remainder of 392.
Write down 6 as next digit of the result. 
Result so far: 29259.256
Deduct 3858 from 4250 and we're left with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Let's proceed to step 12:
3920 divided by 643 is 6 with a remainder of 62.
The number 6 becomes the next digit in our result. 
Result so far: 29259.2566
Deduct 3858 from 3920 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

The quotient of the division is 29259.2566, and the remainder is 0.00062.