79890438 ÷ 144 
We want to figure out the number of times 79890438 can be divided by 144.

Moving on to step 1:
144 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 144

Moving on to step 2:
144 goes into 79 0 times with a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 79 leaves us with 79.
Bring next digit (8) of the dividend behind the 79 and repeat the process: 798 / 144

Step 3:
When dividing 798 by 144, we get 5 with a remainder of 78.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 720 from 798 and we're left with 78.
Grab the next digit (9) from the dividend, add it to 78, then carry on: 789 / 144

Moving on to step 4:
If we divide 789 by 144, we get 5 and a remainder of 69.
Put 5 as the next digit of the answer. 
Result so far: 55.0
Subtract 720 from 789 to get 69.
Grab the next digit (0) from the dividend, add it to 69, then carry on: 690 / 144

Let's proceed to step 5:
690 divided by 144 is 4 with a remainder of 114.
The next digit of our result is 4. 
Result so far: 554.0
The remainder is 114 after subtracting 576 from 690.
Bring next digit (4) of the dividend behind the 114 and repeat the process: 1144 / 144

Going ahead to step 6:
144 goes into 1144 7 times with a remainder of 136.
Write down 7 as next digit of the result. 
Result so far: 5547.0
Deduct 1008 from 1144 and we're left with 136.
Grab the next digit (3) from the dividend, add it to 136, then carry on: 1363 / 144

On to step 7:
When dividing 1363 by 144, we get 9 with a remainder of 67.
Write down 9 as next digit of the result. 
Result so far: 55479.0
The remainder is 67 after subtracting 1296 from 1363.
Bring next digit (8) of the dividend behind the 67 and repeat the process: 678 / 144

Let's proceed to step 8:
144 can be fit into 678 4 times, resulting in a remainder of 102.
The next digit of our result is 4. 
Result so far: 554794.0
Deduct 576 from 678 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Let's proceed to step 9:
144 goes into 1020 7 times with a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 554794.7
The remainder is 12 after subtracting 1008 from 1020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 10:
The number 144 fits into 120 0 times, leaving a remainder of 120.
The number 0 becomes the next digit in our result. 
Result so far: 554794.7
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 11:
When dividing 1200 by 144, we get 8 with a remainder of 48.
Record the quotient 8 as the next digit in the result. 
Result so far: 554794.708
Subtracting 1152 from 1200 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 12:
144 goes into 480 3 times with a remainder of 48.
Use 3 as the next digit of our solution. 
Result so far: 554794.7083
The remainder is 48 after subtracting 432 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 13:
144 goes into 480 3 times with a remainder of 48.
The number 3 becomes the next digit in our result. 
Result so far: 554794.70833
Subtracting 432 from 480 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

After the division, we end up with 554794.70833 and a remainder of 4.8e-05.