42449516 divided by 644 
Our goal is to divide 42449516 by 644.

Advancing to step 1:
644 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 644

Let's proceed to step 2:
644 goes into 42 0 times with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 644

Moving on to step 3:
644 goes into 424 0 times with a remainder of 424.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 424 after subtracting 0 from 424.
Take the next digit (4) from the dividend and append it to 424, then repeat: 4244 / 644

Advancing to step 4:
If we divide 4244 by 644, we get 6 and a remainder of 380.
Write down 6 as next digit of the result. 
Result so far: 6.0
Deduct 3864 from 4244 and we're left with 380.
Include the next digit (9) from the dividend after 380, then repeat: 3809 / 644

Advancing to step 5:
If we divide 3809 by 644, we get 5 and a remainder of 589.
Use 5 as the next digit of our solution. 
Result so far: 65.0
The remainder is 589 after subtracting 3220 from 3809.
Include the next digit (5) from the dividend after 589, then repeat: 5895 / 644

On to step 6:
If we divide 5895 by 644, we get 9 and a remainder of 99.
Put 9 as the next digit of the answer. 
Result so far: 659.0
Subtracting 5796 from 5895 leaves us with 99.
Take the next digit (1) from the dividend and append it to 99, then repeat: 991 / 644

Going ahead to step 7:
The number 644 fits into 991 1 times, leaving a remainder of 347.
Put 1 as the next digit of the answer. 
Result so far: 6591.0
Subtract 644 from 991 to get 347.
Bring next digit (6) of the dividend behind the 347 and repeat the process: 3476 / 644

Going ahead to step 8:
644 can be fit into 3476 5 times, resulting in a remainder of 256.
Use 5 as the next digit of our solution. 
Result so far: 65915.0
If we take 3220 away from 3476, we end up with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Step 9:
If we divide 2560 by 644, we get 3 and a remainder of 628.
The next digit of our result is 3. 
Result so far: 65915.3
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.

Moving on to step 10:
If we divide 6280 by 644, we get 9 and a remainder of 484.
Record the quotient 9 as the next digit in the result. 
Result so far: 65915.39
If we take 5796 away from 6280, we end up 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.

Going ahead to step 11:
644 can be fit into 4840 7 times, resulting in a remainder of 332.
Record the quotient 7 as the next digit in the result. 
Result so far: 65915.397
If we subtract 4508 from 4840, we get 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 12:
644 can be fit into 3320 5 times, resulting in a remainder of 100.
The number 5 becomes the next digit in our result. 
Result so far: 65915.3975
Subtracting 3220 from 3320 leaves us 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.

On to step 13:
When dividing 1000 by 644, we get 1 with a remainder of 356.
Put 1 as the next digit of the answer. 
Result so far: 65915.39751
Subtracting 644 from 1000 leaves us with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Step 14:
If we divide 3560 by 644, we get 5 and a remainder of 340.
Write down 5 as next digit of the result. 
Result so far: 65915.397515
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.

On to step 15:
644 can be fit into 3400 5 times, resulting in a remainder of 180.
Put 5 as the next digit of the answer. 
Result so far: 65915.3975155
If we take 3220 away from 3400, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

The final result is 65915.3975155 with a remainder of 1.8e-06.