We look at the division of 66691046 by 642 
We want to divide 66691046 by 642.

Let's proceed to step 1:
6 divided by 642 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 642

On to step 2:
642 goes into 66 0 times with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Append the next digit (6) from the dividend to 66 and continue with: 666 / 642

Let's proceed to step 3:
642 goes into 666 1 times with a remainder of 24.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 642 from 666, we get 24.
Include the next digit (9) from the dividend after 24, then repeat: 249 / 642

Advancing to step 4:
642 can be fit into 249 0 times, resulting in a remainder of 249.
The next digit of our result is 0. 
Result so far: 10.0
The remainder is 249 after subtracting 0 from 249.
Fetch the next digit (1) from the dividend, attach it to 249 and continue: 2491 / 642

On to step 5:
642 can be fit into 2491 3 times, resulting in a remainder of 565.
Use 3 as the next digit of our solution. 
Result so far: 103.0
Subtracting 1926 from 2491 leaves us with 565.
Fetch the next digit (0) from the dividend, attach it to 565 and continue: 5650 / 642

Moving on to step 6:
642 goes into 5650 8 times with a remainder of 514.
Put 8 as the next digit of the answer. 
Result so far: 1038.0
Subtract 5136 from 5650 to get 514.
Fetch the next digit (4) from the dividend, attach it to 514 and continue: 5144 / 642

Step 7:
642 goes into 5144 8 times with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 10388.0
Subtracting 5136 from 5144 leaves us with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 642

Advancing to step 8:
86 divided by 642 is 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 103880.0
Subtract 0 from 86 to get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 9:
860 divided by 642 is 1 with a remainder of 218.
Use 1 as the next digit of our solution. 
Result so far: 103880.1
If we take 642 away from 860, we end up with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Step 10:
642 goes into 2180 3 times with a remainder of 254.
The next digit of our result is 3. 
Result so far: 103880.13
Deduct 1926 from 2180 and we're left with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

On to step 11:
If we divide 2540 by 642, we get 3 and a remainder of 614.
Put 3 as the next digit of the answer. 
Result so far: 103880.133
If we take 1926 away from 2540, we end up with 614.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6140, and continue the process.

The final result is 103880.133 with a remainder of 0.0614.