98920019 divided by 644 
We're looking to find how many times 644 goes into 98920019.

On to step 1:
The number 644 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 644

Step 2:
644 can be fit into 98 0 times, resulting in a remainder of 98.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 98, we get 98.
Append the next digit (9) from the dividend to 98 and continue with: 989 / 644

Step 3:
989 divided by 644 is 1 with a remainder of 345.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 644 from 989, we get 345.
Include the next digit (2) from the dividend after 345, then repeat: 3452 / 644

On to step 4:
644 goes into 3452 5 times with a remainder of 232.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtract 3220 from 3452 to get 232.
Grab the next digit (0) from the dividend, add it to 232, then carry on: 2320 / 644

On to step 5:
644 can be fit into 2320 3 times, resulting in a remainder of 388.
The next digit of our result is 3. 
Result so far: 153.0
Subtracting 1932 from 2320 leaves us with 388.
Bring next digit (0) of the dividend behind the 388 and repeat the process: 3880 / 644

Advancing to step 6:
644 can be fit into 3880 6 times, resulting in a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 1536.0
Deduct 3864 from 3880 and we're left with 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 644

Moving on to step 7:
644 goes into 161 0 times with a remainder of 161.
Use 0 as the next digit of our solution. 
Result so far: 15360.0
If we take 0 away from 161, we end up with 161.
Bring next digit (9) of the dividend behind the 161 and repeat the process: 1619 / 644

Going ahead to step 8:
When dividing 1619 by 644, we get 2 with a remainder of 331.
Write down 2 as next digit of the result. 
Result so far: 153602.0
The remainder is 331 after subtracting 1288 from 1619.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Going ahead to step 9:
The number 644 fits into 3310 5 times, leaving a remainder of 90.
The number 5 becomes the next digit in our result. 
Result so far: 153602.5
The remainder is 90 after subtracting 3220 from 3310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 10:
If we divide 900 by 644, we get 1 and a remainder of 256.
The next digit of our result is 1. 
Result so far: 153602.51
If we subtract 644 from 900, we get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Advancing to step 11:
The number 644 fits into 2560 3 times, leaving a remainder of 628.
Record the quotient 3 as the next digit in the result. 
Result so far: 153602.513
Subtracting 1932 from 2560 leaves us with 628.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6280, and continue the process.

Let's proceed to step 12:
If we divide 6280 by 644, we get 9 and a remainder of 484.
Use 9 as the next digit of our solution. 
Result so far: 153602.5139
Subtracting 5796 from 6280 leaves us with 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Let's proceed to step 13:
4840 divided by 644 is 7 with a remainder of 332.
Use 7 as the next digit of our solution. 
Result so far: 153602.51397
Subtracting 4508 from 4840 leaves us with 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

Moving on to step 14:
644 goes into 3320 5 times with a remainder of 100.
Record the quotient 5 as the next digit in the result. 
Result so far: 153602.513975
Deduct 3220 from 3320 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 15:
The number 644 fits into 1000 1 times, leaving a remainder of 356.
The next digit of our result is 1. 
Result so far: 153602.5139751
The remainder is 356 after subtracting 644 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

On to step 16:
644 can be fit into 3560 5 times, resulting in a remainder of 340.
Write down 5 as next digit of the result. 
Result so far: 153602.51397515
Subtracting 3220 from 3560 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

The final result is 153602.51397515 with a remainder of 3.4e-07.