We look at the division of 20684438 by 646 
We want to figure out the number of times 20684438 can be divided by 646.

Let's proceed to step 1:
646 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 646

Step 2:
646 can be fit into 20 0 times, resulting in a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Fetch the next digit (6) from the dividend, attach it to 20 and continue: 206 / 646

Moving on to step 3:
The number 646 fits into 206 0 times, leaving a remainder of 206.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 206, we end up with 206.
Bring next digit (8) of the dividend behind the 206 and repeat the process: 2068 / 646

Going ahead to step 4:
When dividing 2068 by 646, we get 3 with a remainder of 130.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 130 after subtracting 1938 from 2068.
Take the next digit (4) from the dividend and append it to 130, then repeat: 1304 / 646

Going ahead to step 5:
If we divide 1304 by 646, we get 2 and a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
Subtracting 1292 from 1304 leaves us with 12.
Grab the next digit (4) from the dividend, add it to 12, then carry on: 124 / 646

On to step 6:
646 can be fit into 124 0 times, resulting in a remainder of 124.
The number 0 becomes the next digit in our result. 
Result so far: 320.0
If we take 0 away from 124, we end up with 124.
Fetch the next digit (3) from the dividend, attach it to 124 and continue: 1243 / 646

Going ahead to step 7:
The number 646 fits into 1243 1 times, leaving a remainder of 597.
Use 1 as the next digit of our solution. 
Result so far: 3201.0
If we take 646 away from 1243, we end up with 597.
Bring next digit (8) of the dividend behind the 597 and repeat the process: 5978 / 646

On to step 8:
If we divide 5978 by 646, we get 9 and a remainder of 164.
The number 9 becomes the next digit in our result. 
Result so far: 32019.0
If we take 5814 away from 5978, we end up with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Going ahead to step 9:
When dividing 1640 by 646, we get 2 with a remainder of 348.
Use 2 as the next digit of our solution. 
Result so far: 32019.2
If we subtract 1292 from 1640, we get 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Step 10:
646 goes into 3480 5 times with a remainder of 250.
The number 5 becomes the next digit in our result. 
Result so far: 32019.25
Subtracting 3230 from 3480 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Step 11:
The number 646 fits into 2500 3 times, leaving a remainder of 562.
Write down 3 as next digit of the result. 
Result so far: 32019.253
The remainder is 562 after subtracting 1938 from 2500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5620, and continue the process.

Step 12:
646 can be fit into 5620 8 times, resulting in a remainder of 452.
Record the quotient 8 as the next digit in the result. 
Result so far: 32019.2538
Subtracting 5168 from 5620 leaves us with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Going ahead to step 13:
646 goes into 4520 6 times with a remainder of 644.
The next digit of our result is 6. 
Result so far: 32019.25386
If we take 3876 away from 4520, we end up with 644.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6440, and continue the process.

Advancing to step 14:
646 can be fit into 6440 9 times, resulting in a remainder of 626.
The number 9 becomes the next digit in our result. 
Result so far: 32019.253869
Deduct 5814 from 6440 and we're left with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Let's proceed to step 15:
646 goes into 6260 9 times with a remainder of 446.
Write down 9 as next digit of the result. 
Result so far: 32019.2538699
If we take 5814 away from 6260, we end up with 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

The quotient of the division is 32019.2538699, and the remainder is 4.46e-06.