We're dividing 77478809 by 987 
We want to divide 77478809 by 987.

Let's proceed to step 1:
987 can be fit into 7 0 times, resulting in 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.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 987

Going ahead to step 2:
If we divide 77 by 987, we get 0 and a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Grab the next digit (4) from the dividend, add it to 77, then carry on: 774 / 987

On to step 3:
774 divided by 987 is 0 with a remainder of 774.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 774 to get 774.
Grab the next digit (7) from the dividend, add it to 774, then carry on: 7747 / 987

Let's proceed to step 4:
7747 divided by 987 is 7 with a remainder of 838.
Write down 7 as next digit of the result. 
Result so far: 7.0
Deduct 6909 from 7747 and we're left with 838.
Take the next digit (8) from the dividend and append it to 838, then repeat: 8388 / 987

Moving on to step 5:
987 goes into 8388 8 times with a remainder of 492.
Write down 8 as next digit of the result. 
Result so far: 78.0
The remainder is 492 after subtracting 7896 from 8388.
Grab the next digit (8) from the dividend, add it to 492, then carry on: 4928 / 987

Advancing to step 6:
The number 987 fits into 4928 4 times, leaving a remainder of 980.
Use 4 as the next digit of our solution. 
Result so far: 784.0
Subtract 3948 from 4928 to get 980.
Include the next digit (0) from the dividend after 980, then repeat: 9800 / 987

Step 7:
When dividing 9800 by 987, we get 9 with a remainder of 917.
The next digit of our result is 9. 
Result so far: 7849.0
If we subtract 8883 from 9800, we get 917.
Take the next digit (9) from the dividend and append it to 917, then repeat: 9179 / 987

Going ahead to step 8:
987 can be fit into 9179 9 times, resulting in a remainder of 296.
The number 9 becomes the next digit in our result. 
Result so far: 78499.0
Subtract 8883 from 9179 to get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Let's proceed to step 9:
2960 divided by 987 is 2 with a remainder of 986.
Use 2 as the next digit of our solution. 
Result so far: 78499.2
Subtract 1974 from 2960 to get 986.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9860, and continue the process.

Step 10:
If we divide 9860 by 987, we get 9 and a remainder of 977.
The next digit of our result is 9. 
Result so far: 78499.29
Subtracting 8883 from 9860 leaves us with 977.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9770, and continue the process.

Let's proceed to step 11:
987 can be fit into 9770 9 times, resulting in a remainder of 887.
The number 9 becomes the next digit in our result. 
Result so far: 78499.299
If we take 8883 away from 9770, we end up with 887.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8870, and continue the process.

After the division, we end up with 78499.299 and a remainder of 0.0887.