We divide 72428328 by 644
Let's see how many times 644 fits into 72428328.

On to step 1:
7 divided by 644 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 644

Advancing to step 2:
When dividing 72 by 644, we get 0 with a remainder of 72.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 72, we end up with 72.
Bring next digit (4) of the dividend behind the 72 and repeat the process: 724 / 644

Step 3:
The number 644 fits into 724 1 times, leaving a remainder of 80.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 644 away from 724, we end up with 80.
Grab the next digit (2) from the dividend, add it to 80, then carry on: 802 / 644

Let's proceed to step 4:
The number 644 fits into 802 1 times, leaving a remainder of 158.
Write down 1 as next digit of the result. 
Result so far: 11.0
Deduct 644 from 802 and we're left with 158.
Fetch the next digit (8) from the dividend, attach it to 158 and continue: 1588 / 644

Advancing to step 5:
The number 644 fits into 1588 2 times, leaving a remainder of 300.
Use 2 as the next digit of our solution. 
Result so far: 112.0
If we subtract 1288 from 1588, we get 300.
Bring next digit (3) of the dividend behind the 300 and repeat the process: 3003 / 644

Going ahead to step 6:
3003 divided by 644 is 4 with a remainder of 427.
Use 4 as the next digit of our solution. 
Result so far: 1124.0
Subtracting 2576 from 3003 leaves us with 427.
Bring next digit (2) of the dividend behind the 427 and repeat the process: 4272 / 644

Going ahead to step 7:
The number 644 fits into 4272 6 times, leaving a remainder of 408.
The next digit of our result is 6. 
Result so far: 11246.0
Subtracting 3864 from 4272 leaves us with 408.
Grab the next digit (8) from the dividend, add it to 408, then carry on: 4088 / 644

Moving on to step 8:
644 can be fit into 4088 6 times, resulting in a remainder of 224.
Put 6 as the next digit of the answer. 
Result so far: 112466.0
Subtracting 3864 from 4088 leaves us with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 9:
2240 divided by 644 is 3 with a remainder of 308.
The next digit of our result is 3. 
Result so far: 112466.3
Subtract 1932 from 2240 to get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Going ahead to step 10:
644 goes into 3080 4 times with a remainder of 504.
The number 4 becomes the next digit in our result. 
Result so far: 112466.34
Subtract 2576 from 3080 to get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Moving on to step 11:
The number 644 fits into 5040 7 times, leaving a remainder of 532.
Record the quotient 7 as the next digit in the result. 
Result so far: 112466.347
Subtracting 4508 from 5040 leaves us with 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Advancing to step 12:
5320 divided by 644 is 8 with a remainder of 168.
The next digit of our result is 8. 
Result so far: 112466.3478
If we subtract 5152 from 5320, we get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Let's proceed to step 13:
When dividing 1680 by 644, we get 2 with a remainder of 392.
Write down 2 as next digit of the result. 
Result so far: 112466.34782
If we subtract 1288 from 1680, we get 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Advancing to step 14:
644 goes into 3920 6 times with a remainder of 56.
The number 6 becomes the next digit in our result. 
Result so far: 112466.347826
If we take 3864 away from 3920, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 15:
When dividing 560 by 644, we get 0 with a remainder of 560.
Use 0 as the next digit of our solution. 
Result so far: 112466.347826
If we subtract 0 from 560, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

On to step 16:
5600 divided by 644 is 8 with a remainder of 448.
Record the quotient 8 as the next digit in the result. 
Result so far: 112466.34782608
Deduct 5152 from 5600 and we're left with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

The final outcome is 112466.34782608, with a leftover of 4.48e-07.