77904507 ÷ 489 
We want to figure out the number of times 77904507 can be divided by 489.

On to step 1:
If we divide 7 by 489, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 489

Advancing to step 2:
If we divide 77 by 489, we get 0 and a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 77 after subtracting 0 from 77.
Take the next digit (9) from the dividend and append it to 77, then repeat: 779 / 489

Advancing to step 3:
The number 489 fits into 779 1 times, leaving a remainder of 290.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 290 after subtracting 489 from 779.
Append the next digit (0) from the dividend to 290 and continue with: 2900 / 489

Let's proceed to step 4:
When dividing 2900 by 489, we get 5 with a remainder of 455.
Write down 5 as next digit of the result. 
Result so far: 15.0
Subtracting 2445 from 2900 leaves us with 455.
Fetch the next digit (4) from the dividend, attach it to 455 and continue: 4554 / 489

Step 5:
4554 divided by 489 is 9 with a remainder of 153.
The number 9 becomes the next digit in our result. 
Result so far: 159.0
Subtracting 4401 from 4554 leaves us with 153.
Take the next digit (5) from the dividend and append it to 153, then repeat: 1535 / 489

On to step 6:
If we divide 1535 by 489, we get 3 and a remainder of 68.
Put 3 as the next digit of the answer. 
Result so far: 1593.0
Subtracting 1467 from 1535 leaves us with 68.
Bring next digit (0) of the dividend behind the 68 and repeat the process: 680 / 489

Advancing to step 7:
489 goes into 680 1 times with a remainder of 191.
The next digit of our result is 1. 
Result so far: 15931.0
If we subtract 489 from 680, we get 191.
Take the next digit (7) from the dividend and append it to 191, then repeat: 1917 / 489

Going ahead to step 8:
If we divide 1917 by 489, we get 3 and a remainder of 450.
The next digit of our result is 3. 
Result so far: 159313.0
The remainder is 450 after subtracting 1467 from 1917.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Step 9:
If we divide 4500 by 489, we get 9 and a remainder of 99.
The number 9 becomes the next digit in our result. 
Result so far: 159313.9
Deduct 4401 from 4500 and we're left with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Let's proceed to step 10:
When dividing 990 by 489, we get 2 with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 159313.92
Deduct 978 from 990 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 11:
The number 489 fits into 120 0 times, leaving a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 159313.92
Subtract 0 from 120 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 12:
When dividing 1200 by 489, we get 2 with a remainder of 222.
Put 2 as the next digit of the answer. 
Result so far: 159313.9202
If we take 978 away from 1200, we end up with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Going ahead to step 13:
When dividing 2220 by 489, we get 4 with a remainder of 264.
Record the quotient 4 as the next digit in the result. 
Result so far: 159313.92024
If we take 1956 away from 2220, we end up with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Let's proceed to step 14:
If we divide 2640 by 489, we get 5 and a remainder of 195.
Write down 5 as next digit of the result. 
Result so far: 159313.920245
The remainder is 195 after subtracting 2445 from 2640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Going ahead to step 15:
489 goes into 1950 3 times with a remainder of 483.
Write down 3 as next digit of the result. 
Result so far: 159313.9202453
Subtracting 1467 from 1950 leaves us with 483.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

Step 16:
489 goes into 4830 9 times with a remainder of 429.
Write down 9 as next digit of the result. 
Result so far: 159313.92024539
Subtracting 4401 from 4830 leaves us with 429.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4290, and continue the process.

Our division results in 159313.92024539 with a remaining 4.29e-07.