Let's divide 415518 by 644
We're looking to find how many times 644 goes into 415518.

Step 1:
644 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 644

Step 2:
41 divided by 644 is 0 with a remainder of 41.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 41 and we're left with 41.
Bring next digit (5) of the dividend behind the 41 and repeat the process: 415 / 644

Going ahead to step 3:
415 divided by 644 is 0 with a remainder of 415.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 415 to get 415.
Take the next digit (5) from the dividend and append it to 415, then repeat: 4155 / 644

Moving on to step 4:
644 can be fit into 4155 6 times, resulting in a remainder of 291.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 291 after subtracting 3864 from 4155.
Fetch the next digit (1) from the dividend, attach it to 291 and continue: 2911 / 644

Moving on to step 5:
2911 divided by 644 is 4 with a remainder of 335.
Put 4 as the next digit of the answer. 
Result so far: 64.0
Subtracting 2576 from 2911 leaves us with 335.
Take the next digit (8) from the dividend and append it to 335, then repeat: 3358 / 644

On to step 6:
644 can be fit into 3358 5 times, resulting in a remainder of 138.
Write down 5 as next digit of the result. 
Result so far: 645.0
The remainder is 138 after subtracting 3220 from 3358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Step 7:
If we divide 1380 by 644, we get 2 and a remainder of 92.
Put 2 as the next digit of the answer. 
Result so far: 645.2
The remainder is 92 after subtracting 1288 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 8:
The number 644 fits into 920 1 times, leaving a remainder of 276.
Put 1 as the next digit of the answer. 
Result so far: 645.21
If we take 644 away from 920, we end up with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Moving on to step 9:
The number 644 fits into 2760 4 times, leaving a remainder of 184.
The next digit of our result is 4. 
Result so far: 645.214
Deduct 2576 from 2760 and we're left with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Going ahead to step 10:
When dividing 1840 by 644, we get 2 with a remainder of 552.
Use 2 as the next digit of our solution. 
Result so far: 645.2142
If we take 1288 away from 1840, we end up with 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

Going ahead to step 11:
When dividing 5520 by 644, we get 8 with a remainder of 368.
Record the quotient 8 as the next digit in the result. 
Result so far: 645.21428
Subtract 5152 from 5520 to get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Advancing to step 12:
The number 644 fits into 3680 5 times, leaving a remainder of 460.
Use 5 as the next digit of our solution. 
Result so far: 645.214285
Deduct 3220 from 3680 and we're left with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Going ahead to step 13:
The number 644 fits into 4600 7 times, leaving a remainder of 92.
Put 7 as the next digit of the answer. 
Result so far: 645.2142857
Deduct 4508 from 4600 and we're left with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 14:
If we divide 920 by 644, we get 1 and a remainder of 276.
Write down 1 as next digit of the result. 
Result so far: 645.21428571
If we subtract 644 from 920, we get 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

The final outcome is 645.21428571, with a leftover of 2.76e-07.