Let's divide 34154254 by 644
We want to figure out the number of times 34154254 can be divided by 644.

Step 1:
If we divide 3 by 644, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 644

Going ahead to step 2:
644 goes into 34 0 times with a remainder of 34.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 34 after subtracting 0 from 34.
Grab the next digit (1) from the dividend, add it to 34, then carry on: 341 / 644

Advancing to step 3:
644 can be fit into 341 0 times, resulting in a remainder of 341.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 341, we get 341.
Grab the next digit (5) from the dividend, add it to 341, then carry on: 3415 / 644

Going ahead to step 4:
The number 644 fits into 3415 5 times, leaving a remainder of 195.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 3220 away from 3415, we end up with 195.
Grab the next digit (4) from the dividend, add it to 195, then carry on: 1954 / 644

Moving on to step 5:
1954 divided by 644 is 3 with a remainder of 22.
The next digit of our result is 3. 
Result so far: 53.0
Subtract 1932 from 1954 to get 22.
Include the next digit (2) from the dividend after 22, then repeat: 222 / 644

Moving on to step 6:
222 divided by 644 is 0 with a remainder of 222.
Put 0 as the next digit of the answer. 
Result so far: 530.0
If we take 0 away from 222, we end up with 222.
Fetch the next digit (5) from the dividend, attach it to 222 and continue: 2225 / 644

Moving on to step 7:
644 can be fit into 2225 3 times, resulting in a remainder of 293.
Put 3 as the next digit of the answer. 
Result so far: 5303.0
The remainder is 293 after subtracting 1932 from 2225.
Grab the next digit (4) from the dividend, add it to 293, then carry on: 2934 / 644

Advancing to step 8:
644 goes into 2934 4 times with a remainder of 358.
Put 4 as the next digit of the answer. 
Result so far: 53034.0
The remainder is 358 after subtracting 2576 from 2934.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Moving on to step 9:
644 can be fit into 3580 5 times, resulting in a remainder of 360.
The next digit of our result is 5. 
Result so far: 53034.5
Subtract 3220 from 3580 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Step 10:
If we divide 3600 by 644, we get 5 and a remainder of 380.
Put 5 as the next digit of the answer. 
Result so far: 53034.55
Subtract 3220 from 3600 to get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Our division results in 53034.55 with a remaining 0.38.