4175162 ÷ 644 
We want to figure out the number of times 4175162 can be divided by 644.

On to step 1:
When dividing 4 by 644, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 644

Moving on to step 2:
When dividing 41 by 644, we get 0 with a remainder of 41.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 41, we get 41.
Grab the next digit (7) from the dividend, add it to 41, then carry on: 417 / 644

On to step 3:
417 divided by 644 is 0 with a remainder of 417.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 417, we get 417.
Bring next digit (5) of the dividend behind the 417 and repeat the process: 4175 / 644

Let's proceed to step 4:
644 goes into 4175 6 times with a remainder of 311.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 311 after subtracting 3864 from 4175.
Append the next digit (1) from the dividend to 311 and continue with: 3111 / 644

Let's proceed to step 5:
If we divide 3111 by 644, we get 4 and a remainder of 535.
Put 4 as the next digit of the answer. 
Result so far: 64.0
Deduct 2576 from 3111 and we're left with 535.
Bring next digit (6) of the dividend behind the 535 and repeat the process: 5356 / 644

On to step 6:
644 goes into 5356 8 times with a remainder of 204.
The number 8 becomes the next digit in our result. 
Result so far: 648.0
The remainder is 204 after subtracting 5152 from 5356.
Fetch the next digit (2) from the dividend, attach it to 204 and continue: 2042 / 644

Step 7:
If we divide 2042 by 644, we get 3 and a remainder of 110.
Use 3 as the next digit of our solution. 
Result so far: 6483.0
Deduct 1932 from 2042 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Moving on to step 8:
1100 divided by 644 is 1 with a remainder of 456.
The number 1 becomes the next digit in our result. 
Result so far: 6483.1
Subtracting 644 from 1100 leaves us with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Step 9:
If we divide 4560 by 644, we get 7 and a remainder of 52.
Use 7 as the next digit of our solution. 
Result so far: 6483.17
Subtract 4508 from 4560 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 10:
If we divide 520 by 644, we get 0 and a remainder of 520.
The number 0 becomes the next digit in our result. 
Result so far: 6483.17
If we subtract 0 from 520, we get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Moving on to step 11:
When dividing 5200 by 644, we get 8 with a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 6483.1708
If we subtract 5152 from 5200, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 12:
When dividing 480 by 644, we get 0 with a remainder of 480.
Put 0 as the next digit of the answer. 
Result so far: 6483.1708
Subtracting 0 from 480 leaves us with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 13:
The number 644 fits into 4800 7 times, leaving a remainder of 292.
Put 7 as the next digit of the answer. 
Result so far: 6483.170807
Subtract 4508 from 4800 to get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Going ahead to step 14:
If we divide 2920 by 644, we get 4 and a remainder of 344.
The next digit of our result is 4. 
Result so far: 6483.1708074
If we take 2576 away from 2920, we end up with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Going ahead to step 15:
644 goes into 3440 5 times with a remainder of 220.
The next digit of our result is 5. 
Result so far: 6483.17080745
If we subtract 3220 from 3440, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Our division results in 6483.17080745 with a remaining 2.2e-07.