Let's divide 91804949 by 644
We want to figure out the number of times 91804949 can be divided by 644.

Advancing to step 1:
If we divide 9 by 644, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 644

Let's proceed to step 2:
91 divided by 644 is 0 with a remainder of 91.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Grab the next digit (8) from the dividend, add it to 91, then carry on: 918 / 644

On to step 3:
644 goes into 918 1 times with a remainder of 274.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 274 after subtracting 644 from 918.
Take the next digit (0) from the dividend and append it to 274, then repeat: 2740 / 644

On to step 4:
644 goes into 2740 4 times with a remainder of 164.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Subtract 2576 from 2740 to get 164.
Fetch the next digit (4) from the dividend, attach it to 164 and continue: 1644 / 644

On to step 5:
When dividing 1644 by 644, we get 2 with a remainder of 356.
Write down 2 as next digit of the result. 
Result so far: 142.0
If we subtract 1288 from 1644, we get 356.
Fetch the next digit (9) from the dividend, attach it to 356 and continue: 3569 / 644

Advancing to step 6:
644 can be fit into 3569 5 times, resulting in a remainder of 349.
Use 5 as the next digit of our solution. 
Result so far: 1425.0
The remainder is 349 after subtracting 3220 from 3569.
Bring next digit (4) of the dividend behind the 349 and repeat the process: 3494 / 644

On to step 7:
644 can be fit into 3494 5 times, resulting in a remainder of 274.
Write down 5 as next digit of the result. 
Result so far: 14255.0
Deduct 3220 from 3494 and we're left with 274.
Grab the next digit (9) from the dividend, add it to 274, then carry on: 2749 / 644

Going ahead to step 8:
If we divide 2749 by 644, we get 4 and a remainder of 173.
Put 4 as the next digit of the answer. 
Result so far: 142554.0
The remainder is 173 after subtracting 2576 from 2749.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

On to step 9:
644 can be fit into 1730 2 times, resulting in a remainder of 442.
Use 2 as the next digit of our solution. 
Result so far: 142554.2
If we subtract 1288 from 1730, we get 442.
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:
If we divide 4420 by 644, we get 6 and a remainder of 556.
The next digit of our result is 6. 
Result so far: 142554.26
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:
The number 644 fits into 5560 8 times, leaving a remainder of 408.
Record the quotient 8 as the next digit in the result. 
Result so far: 142554.268
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: 142554.2686
If we subtract 3864 from 4080, we get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 13:
2160 divided by 644 is 3 with a remainder of 228.
Record the quotient 3 as the next digit in the result. 
Result so far: 142554.26863
Subtract 1932 from 2160 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 14:
When dividing 2280 by 644, we get 3 with a remainder of 348.
Record the quotient 3 as the next digit in the result. 
Result so far: 142554.268633
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 142554.268633, with a leftover of 3.48e-05.