Let's divide 18648709 by 642
We're looking to find how many times 642 goes into 18648709.

Step 1:
The number 642 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 642

On to step 2:
When dividing 18 by 642, we get 0 with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Bring next digit (6) of the dividend behind the 18 and repeat the process: 186 / 642

Let's proceed to step 3:
The number 642 fits into 186 0 times, leaving a remainder of 186.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 186 to get 186.
Grab the next digit (4) from the dividend, add it to 186, then carry on: 1864 / 642

Moving on to step 4:
642 can be fit into 1864 2 times, resulting in a remainder of 580.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 1284 from 1864, we get 580.
Append the next digit (8) from the dividend to 580 and continue with: 5808 / 642

On to step 5:
5808 divided by 642 is 9 with a remainder of 30.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
Deduct 5778 from 5808 and we're left with 30.
Take the next digit (7) from the dividend and append it to 30, then repeat: 307 / 642

Moving on to step 6:
When dividing 307 by 642, we get 0 with a remainder of 307.
Use 0 as the next digit of our solution. 
Result so far: 290.0
Subtracting 0 from 307 leaves us with 307.
Append the next digit (0) from the dividend to 307 and continue with: 3070 / 642

On to step 7:
The number 642 fits into 3070 4 times, leaving a remainder of 502.
Put 4 as the next digit of the answer. 
Result so far: 2904.0
If we subtract 2568 from 3070, we get 502.
Fetch the next digit (9) from the dividend, attach it to 502 and continue: 5029 / 642

Step 8:
The number 642 fits into 5029 7 times, leaving a remainder of 535.
Write down 7 as next digit of the result. 
Result so far: 29047.0
Subtract 4494 from 5029 to get 535.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5350, and continue the process.

Moving on to step 9:
The number 642 fits into 5350 8 times, leaving a remainder of 214.
Use 8 as the next digit of our solution. 
Result so far: 29047.8
If we take 5136 away from 5350, we end up with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

On to step 10:
2140 divided by 642 is 3 with a remainder of 214.
The next digit of our result is 3. 
Result so far: 29047.83
If we subtract 1926 from 2140, we get 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Moving on to step 11:
The number 642 fits into 2140 3 times, leaving a remainder of 214.
Record the quotient 3 as the next digit in the result. 
Result so far: 29047.833
The remainder is 214 after subtracting 1926 from 2140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

The final result is 29047.833 with a remainder of 0.0214.