We're dividing 21690678 by 647 
We want to figure out the number of times 21690678 can be divided by 647.

Moving on to step 1:
If we divide 2 by 647, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 647

On to step 2:
647 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Include the next digit (6) from the dividend after 21, then repeat: 216 / 647

Going ahead to step 3:
If we divide 216 by 647, we get 0 and a remainder of 216.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 216, we end up with 216.
Grab the next digit (9) from the dividend, add it to 216, then carry on: 2169 / 647

Step 4:
The number 647 fits into 2169 3 times, leaving a remainder of 228.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 1941 from 2169 leaves us with 228.
Take the next digit (0) from the dividend and append it to 228, then repeat: 2280 / 647

Moving on to step 5:
647 goes into 2280 3 times with a remainder of 339.
Put 3 as the next digit of the answer. 
Result so far: 33.0
Subtract 1941 from 2280 to get 339.
Append the next digit (6) from the dividend to 339 and continue with: 3396 / 647

On to step 6:
647 goes into 3396 5 times with a remainder of 161.
Put 5 as the next digit of the answer. 
Result so far: 335.0
If we take 3235 away from 3396, we end up with 161.
Append the next digit (7) from the dividend to 161 and continue with: 1617 / 647

On to step 7:
647 goes into 1617 2 times with a remainder of 323.
The next digit of our result is 2. 
Result so far: 3352.0
Subtracting 1294 from 1617 leaves us with 323.
Include the next digit (8) from the dividend after 323, then repeat: 3238 / 647

Let's proceed to step 8:
If we divide 3238 by 647, we get 5 and a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 33525.0
If we subtract 3235 from 3238, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 9:
The number 647 fits into 30 0 times, leaving a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 33525.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 10:
When dividing 300 by 647, we get 0 with a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 33525.0
Subtracting 0 from 300 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

After the division, we end up with 33525.0 and a remainder of 0.3.