87090791 ÷ 780 
Our goal is to divide 87090791 by 780.

Advancing to step 1:
The number 780 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 780

Advancing to step 2:
780 can be fit into 87 0 times, resulting in a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 87 after subtracting 0 from 87.
Take the next digit (0) from the dividend and append it to 87, then repeat: 870 / 780

Let's proceed to step 3:
When dividing 870 by 780, we get 1 with a remainder of 90.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 780 from 870 leaves us with 90.
Append the next digit (9) from the dividend to 90 and continue with: 909 / 780

Going ahead to step 4:
If we divide 909 by 780, we get 1 and a remainder of 129.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we subtract 780 from 909, we get 129.
Grab the next digit (0) from the dividend, add it to 129, then carry on: 1290 / 780

Advancing to step 5:
1290 divided by 780 is 1 with a remainder of 510.
Write down 1 as next digit of the result. 
Result so far: 111.0
If we subtract 780 from 1290, we get 510.
Take the next digit (7) from the dividend and append it to 510, then repeat: 5107 / 780

Step 6:
5107 divided by 780 is 6 with a remainder of 427.
Write down 6 as next digit of the result. 
Result so far: 1116.0
Deduct 4680 from 5107 and we're left with 427.
Bring next digit (9) of the dividend behind the 427 and repeat the process: 4279 / 780

Step 7:
780 goes into 4279 5 times with a remainder of 379.
Record the quotient 5 as the next digit in the result. 
Result so far: 11165.0
Subtracting 3900 from 4279 leaves us with 379.
Include the next digit (1) from the dividend after 379, then repeat: 3791 / 780

On to step 8:
If we divide 3791 by 780, we get 4 and a remainder of 671.
Record the quotient 4 as the next digit in the result. 
Result so far: 111654.0
Subtract 3120 from 3791 to get 671.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6710, and continue the process.

Advancing to step 9:
The number 780 fits into 6710 8 times, leaving a remainder of 470.
Write down 8 as next digit of the result. 
Result so far: 111654.8
If we subtract 6240 from 6710, we get 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Going ahead to step 10:
The number 780 fits into 4700 6 times, leaving a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 111654.86
The remainder is 20 after subtracting 4680 from 4700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 11:
If we divide 200 by 780, we get 0 and a remainder of 200.
The next digit of our result is 0. 
Result so far: 111654.86
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 12:
When dividing 2000 by 780, we get 2 with a remainder of 440.
Put 2 as the next digit of the answer. 
Result so far: 111654.8602
The remainder is 440 after subtracting 1560 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Step 13:
When dividing 4400 by 780, we get 5 with a remainder of 500.
The next digit of our result is 5. 
Result so far: 111654.86025
Deduct 3900 from 4400 and we're left with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Let's proceed to step 14:
If we divide 5000 by 780, we get 6 and a remainder of 320.
Use 6 as the next digit of our solution. 
Result so far: 111654.860256
If we take 4680 away from 5000, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 15:
The number 780 fits into 3200 4 times, leaving a remainder of 80.
Put 4 as the next digit of the answer. 
Result so far: 111654.8602564
If we take 3120 away from 3200, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 16:
If we divide 800 by 780, we get 1 and a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 111654.86025641
If we take 780 away from 800, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 111654.86025641 with a balance of 2e-08.