81581740 ÷ 780 
Our goal is to divide 81581740 by 780.

Let's proceed to step 1:
When dividing 8 by 780, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 780

Advancing to step 2:
When dividing 81 by 780, we get 0 with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Fetch the next digit (5) from the dividend, attach it to 81 and continue: 815 / 780

Step 3:
780 goes into 815 1 times with a remainder of 35.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 780 from 815 leaves us with 35.
Grab the next digit (8) from the dividend, add it to 35, then carry on: 358 / 780

Going ahead to step 4:
780 goes into 358 0 times with a remainder of 358.
The next digit of our result is 0. 
Result so far: 10.0
Deduct 0 from 358 and we're left with 358.
Fetch the next digit (1) from the dividend, attach it to 358 and continue: 3581 / 780

Going ahead to step 5:
If we divide 3581 by 780, we get 4 and a remainder of 461.
Write down 4 as next digit of the result. 
Result so far: 104.0
Deduct 3120 from 3581 and we're left with 461.
Grab the next digit (7) from the dividend, add it to 461, then carry on: 4617 / 780

Going ahead to step 6:
780 goes into 4617 5 times with a remainder of 717.
The number 5 becomes the next digit in our result. 
Result so far: 1045.0
If we subtract 3900 from 4617, we get 717.
Bring next digit (4) of the dividend behind the 717 and repeat the process: 7174 / 780

Going ahead to step 7:
When dividing 7174 by 780, we get 9 with a remainder of 154.
Write down 9 as next digit of the result. 
Result so far: 10459.0
Subtracting 7020 from 7174 leaves us with 154.
Include the next digit (0) from the dividend after 154, then repeat: 1540 / 780

Going ahead to step 8:
1540 divided by 780 is 1 with a remainder of 760.
Record the quotient 1 as the next digit in the result. 
Result so far: 104591.0
Deduct 780 from 1540 and we're left with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Step 9:
7600 divided by 780 is 9 with a remainder of 580.
Record the quotient 9 as the next digit in the result. 
Result so far: 104591.9
Deduct 7020 from 7600 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Let's proceed to step 10:
When dividing 5800 by 780, we get 7 with a remainder of 340.
Record the quotient 7 as the next digit in the result. 
Result so far: 104591.97
Subtracting 5460 from 5800 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 11:
780 goes into 3400 4 times with a remainder of 280.
The next digit of our result is 4. 
Result so far: 104591.974
Subtract 3120 from 3400 to get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Let's proceed to step 12:
When dividing 2800 by 780, we get 3 with a remainder of 460.
Use 3 as the next digit of our solution. 
Result so far: 104591.9743
Subtract 2340 from 2800 to get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Advancing to step 13:
The number 780 fits into 4600 5 times, leaving a remainder of 700.
Use 5 as the next digit of our solution. 
Result so far: 104591.97435
If we take 3900 away from 4600, we end up with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Step 14:
780 can be fit into 7000 8 times, resulting in a remainder of 760.
Use 8 as the next digit of our solution. 
Result so far: 104591.974358
Deduct 6240 from 7000 and we're left with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Step 15:
7600 divided by 780 is 9 with a remainder of 580.
Write down 9 as next digit of the result. 
Result so far: 104591.9743589
The remainder is 580 after subtracting 7020 from 7600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Going ahead to step 16:
5800 divided by 780 is 7 with a remainder of 340.
Record the quotient 7 as the next digit in the result. 
Result so far: 104591.97435897
Subtract 5460 from 5800 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

After the division, we end up with 104591.97435897 and a remainder of 3.4e-07.