We're dividing 63573890 by 644 
We want to divide 63573890 by 644.

Moving on to step 1:
644 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 644

On to step 2:
63 divided by 644 is 0 with a remainder of 63.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 63 after subtracting 0 from 63.
Grab the next digit (5) from the dividend, add it to 63, then carry on: 635 / 644

Going ahead to step 3:
644 goes into 635 0 times with a remainder of 635.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 635 to get 635.
Bring next digit (7) of the dividend behind the 635 and repeat the process: 6357 / 644

Step 4:
6357 divided by 644 is 9 with a remainder of 561.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 5796 away from 6357, we end up with 561.
Append the next digit (3) from the dividend to 561 and continue with: 5613 / 644

Going ahead to step 5:
When dividing 5613 by 644, we get 8 with a remainder of 461.
Write down 8 as next digit of the result. 
Result so far: 98.0
If we subtract 5152 from 5613, we get 461.
Grab the next digit (8) from the dividend, add it to 461, then carry on: 4618 / 644

Advancing to step 6:
If we divide 4618 by 644, we get 7 and a remainder of 110.
The number 7 becomes the next digit in our result. 
Result so far: 987.0
The remainder is 110 after subtracting 4508 from 4618.
Include the next digit (9) from the dividend after 110, then repeat: 1109 / 644

Step 7:
1109 divided by 644 is 1 with a remainder of 465.
Use 1 as the next digit of our solution. 
Result so far: 9871.0
If we subtract 644 from 1109, we get 465.
Fetch the next digit (0) from the dividend, attach it to 465 and continue: 4650 / 644

Moving on to step 8:
644 goes into 4650 7 times with a remainder of 142.
Record the quotient 7 as the next digit in the result. 
Result so far: 98717.0
Subtracting 4508 from 4650 leaves us with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Going ahead to step 9:
When dividing 1420 by 644, we get 2 with a remainder of 132.
The next digit of our result is 2. 
Result so far: 98717.2
If we subtract 1288 from 1420, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

On to step 10:
If we divide 1320 by 644, we get 2 and a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 98717.22
If we take 1288 away from 1320, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

In conclusion, the division gives 98717.22 with a balance of 0.032.