Let's divide 20367521 by 644
Our goal is to divide 20367521 by 644.

Moving on to step 1:
When dividing 2 by 644, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 644

Advancing to step 2:
20 divided by 644 is 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Bring next digit (3) of the dividend behind the 20 and repeat the process: 203 / 644

Step 3:
If we divide 203 by 644, we get 0 and a remainder of 203.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 203, we end up with 203.
Append the next digit (6) from the dividend to 203 and continue with: 2036 / 644

Advancing to step 4:
The number 644 fits into 2036 3 times, leaving a remainder of 104.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 1932 from 2036 and we're left with 104.
Take the next digit (7) from the dividend and append it to 104, then repeat: 1047 / 644

Going ahead to step 5:
If we divide 1047 by 644, we get 1 and a remainder of 403.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
The remainder is 403 after subtracting 644 from 1047.
Grab the next digit (5) from the dividend, add it to 403, then carry on: 4035 / 644

Advancing to step 6:
644 can be fit into 4035 6 times, resulting in a remainder of 171.
The next digit of our result is 6. 
Result so far: 316.0
Subtracting 3864 from 4035 leaves us with 171.
Take the next digit (2) from the dividend and append it to 171, then repeat: 1712 / 644

Advancing to step 7:
644 can be fit into 1712 2 times, resulting in a remainder of 424.
Use 2 as the next digit of our solution. 
Result so far: 3162.0
If we subtract 1288 from 1712, we get 424.
Append the next digit (1) from the dividend to 424 and continue with: 4241 / 644

Going ahead to step 8:
4241 divided by 644 is 6 with a remainder of 377.
Write down 6 as next digit of the result. 
Result so far: 31626.0
Deduct 3864 from 4241 and we're left with 377.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3770, and continue the process.

Let's proceed to step 9:
644 can be fit into 3770 5 times, resulting in a remainder of 550.
Record the quotient 5 as the next digit in the result. 
Result so far: 31626.5
Subtracting 3220 from 3770 leaves us 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.

Going ahead to step 10:
The number 644 fits into 5500 8 times, leaving a remainder of 348.
Record the quotient 8 as the next digit in the result. 
Result so far: 31626.58
Subtracting 5152 from 5500 leaves us with 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 11:
644 goes into 3480 5 times with a remainder of 260.
The number 5 becomes the next digit in our result. 
Result so far: 31626.585
The remainder is 260 after subtracting 3220 from 3480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 12:
When dividing 2600 by 644, we get 4 with a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 31626.5854
Subtract 2576 from 2600 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 13:
If we divide 240 by 644, we get 0 and a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 31626.5854
Subtract 0 from 240 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 14:
The number 644 fits into 2400 3 times, leaving a remainder of 468.
Record the quotient 3 as the next digit in the result. 
Result so far: 31626.585403
Deduct 1932 from 2400 and we're left with 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Step 15:
4680 divided by 644 is 7 with a remainder of 172.
The number 7 becomes the next digit in our result. 
Result so far: 31626.5854037
If we take 4508 away from 4680, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 16:
644 can be fit into 1720 2 times, resulting in a remainder of 432.
Put 2 as the next digit of the answer. 
Result so far: 31626.58540372
Subtract 1288 from 1720 to get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

The quotient of the division is 31626.58540372, and the remainder is 4.32e-07.