20315680 ÷ 649 
We're looking to find how many times 649 goes into 20315680.

Let's proceed to step 1:
If we divide 2 by 649, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 649

Going ahead to step 2:
20 divided by 649 is 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Bring next digit (3) of the dividend behind the 20 and repeat the process: 203 / 649

Moving on to step 3:
When dividing 203 by 649, we get 0 with a remainder of 203.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 203 leaves us with 203.
Take the next digit (1) from the dividend and append it to 203, then repeat: 2031 / 649

Let's proceed to step 4:
649 goes into 2031 3 times with a remainder of 84.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 1947 away from 2031, we end up with 84.
Include the next digit (5) from the dividend after 84, then repeat: 845 / 649

On to step 5:
649 goes into 845 1 times with a remainder of 196.
Use 1 as the next digit of our solution. 
Result so far: 31.0
Subtract 649 from 845 to get 196.
Fetch the next digit (6) from the dividend, attach it to 196 and continue: 1966 / 649

Going ahead to step 6:
The number 649 fits into 1966 3 times, leaving a remainder of 19.
Write down 3 as next digit of the result. 
Result so far: 313.0
Subtract 1947 from 1966 to get 19.
Grab the next digit (8) from the dividend, add it to 19, then carry on: 198 / 649

Step 7:
The number 649 fits into 198 0 times, leaving a remainder of 198.
The number 0 becomes the next digit in our result. 
Result so far: 3130.0
If we subtract 0 from 198, we get 198.
Fetch the next digit (0) from the dividend, attach it to 198 and continue: 1980 / 649

Let's proceed to step 8:
649 goes into 1980 3 times with a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 31303.0
If we take 1947 away from 1980, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 9:
When dividing 330 by 649, we get 0 with a remainder of 330.
Record the quotient 0 as the next digit in the result. 
Result so far: 31303.0
If we subtract 0 from 330, we get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

On to step 10:
If we divide 3300 by 649, we get 5 and a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 31303.05
Subtracting 3245 from 3300 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 11:
649 goes into 550 0 times with a remainder of 550.
Use 0 as the next digit of our solution. 
Result so far: 31303.05
If we take 0 away from 550, we end up with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

On to step 12:
649 goes into 5500 8 times with a remainder of 308.
The number 8 becomes the next digit in our result. 
Result so far: 31303.0508
Subtracting 5192 from 5500 leaves us with 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Advancing to step 13:
When dividing 3080 by 649, we get 4 with a remainder of 484.
The next digit of our result is 4. 
Result so far: 31303.05084
Subtract 2596 from 3080 to get 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

On to step 14:
The number 649 fits into 4840 7 times, leaving a remainder of 297.
Write down 7 as next digit of the result. 
Result so far: 31303.050847
Subtracting 4543 from 4840 leaves us with 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Let's proceed to step 15:
When dividing 2970 by 649, we get 4 with a remainder of 374.
Use 4 as the next digit of our solution. 
Result so far: 31303.0508474
Subtracting 2596 from 2970 leaves us with 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

On to step 16:
When dividing 3740 by 649, we get 5 with a remainder of 495.
The number 5 becomes the next digit in our result. 
Result so far: 31303.05084745
Subtract 3245 from 3740 to get 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

The quotient of the division is 31303.05084745, and the remainder is 4.95e-07.