We look at the division of 10420093 by 644 
We want to figure out the number of times 10420093 can be divided by 644.

Advancing to step 1:
When dividing 1 by 644, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 644

Let's proceed to step 2:
10 divided by 644 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 10 after subtracting 0 from 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 644

Moving on to step 3:
If we divide 104 by 644, we get 0 and a remainder of 104.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 104 after subtracting 0 from 104.
Fetch the next digit (2) from the dividend, attach it to 104 and continue: 1042 / 644

Advancing to step 4:
When dividing 1042 by 644, we get 1 with a remainder of 398.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 644 from 1042 leaves us with 398.
Include the next digit (0) from the dividend after 398, then repeat: 3980 / 644

Let's proceed to step 5:
3980 divided by 644 is 6 with a remainder of 116.
The next digit of our result is 6. 
Result so far: 16.0
The remainder is 116 after subtracting 3864 from 3980.
Fetch the next digit (0) from the dividend, attach it to 116 and continue: 1160 / 644

Advancing to step 6:
The number 644 fits into 1160 1 times, leaving a remainder of 516.
Write down 1 as next digit of the result. 
Result so far: 161.0
The remainder is 516 after subtracting 644 from 1160.
Take the next digit (9) from the dividend and append it to 516, then repeat: 5169 / 644

Let's proceed to step 7:
5169 divided by 644 is 8 with a remainder of 17.
The number 8 becomes the next digit in our result. 
Result so far: 1618.0
The remainder is 17 after subtracting 5152 from 5169.
Bring next digit (3) of the dividend behind the 17 and repeat the process: 173 / 644

Let's proceed to step 8:
173 divided by 644 is 0 with a remainder of 173.
Record the quotient 0 as the next digit in the result. 
Result so far: 16180.0
If we subtract 0 from 173, we get 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Step 9:
When dividing 1730 by 644, we get 2 with a remainder of 442.
Write down 2 as next digit of the result. 
Result so far: 16180.2
The remainder is 442 after subtracting 1288 from 1730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Going ahead to step 10:
The number 644 fits into 4420 6 times, leaving a remainder of 556.
Record the quotient 6 as the next digit in the result. 
Result so far: 16180.26
Subtracting 3864 from 4420 leaves us with 556.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

On to step 11:
644 can be fit into 5560 8 times, resulting in a remainder of 408.
Record the quotient 8 as the next digit in the result. 
Result so far: 16180.268
Subtract 5152 from 5560 to get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Step 12:
If we divide 4080 by 644, we get 6 and a remainder of 216.
Put 6 as the next digit of the answer. 
Result so far: 16180.2686
Deduct 3864 from 4080 and we're left with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Let's proceed to step 13:
2160 divided by 644 is 3 with a remainder of 228.
The next digit of our result is 3. 
Result so far: 16180.26863
If we take 1932 away from 2160, we end up with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Moving on to step 14:
644 goes into 2280 3 times with a remainder of 348.
The next digit of our result is 3. 
Result so far: 16180.268633
Subtracting 1932 from 2280 leaves us with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

The final outcome is 16180.268633, with a leftover of 3.48e-05.