76665351 ÷ 870 
We want to figure out the number of times 76665351 can be divided by 870.

On to step 1:
If we divide 7 by 870, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 870

Moving on to step 2:
The number 870 fits into 76 0 times, leaving a remainder of 76.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Append the next digit (6) from the dividend to 76 and continue with: 766 / 870

On to step 3:
870 goes into 766 0 times with a remainder of 766.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 766 and we're left with 766.
Grab the next digit (6) from the dividend, add it to 766, then carry on: 7666 / 870

Step 4:
870 goes into 7666 8 times with a remainder of 706.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 6960 from 7666 leaves us with 706.
Grab the next digit (5) from the dividend, add it to 706, then carry on: 7065 / 870

On to step 5:
870 can be fit into 7065 8 times, resulting in a remainder of 105.
Use 8 as the next digit of our solution. 
Result so far: 88.0
The remainder is 105 after subtracting 6960 from 7065.
Grab the next digit (3) from the dividend, add it to 105, then carry on: 1053 / 870

Step 6:
870 goes into 1053 1 times with a remainder of 183.
The number 1 becomes the next digit in our result. 
Result so far: 881.0
Subtract 870 from 1053 to get 183.
Take the next digit (5) from the dividend and append it to 183, then repeat: 1835 / 870

Moving on to step 7:
When dividing 1835 by 870, we get 2 with a remainder of 95.
Write down 2 as next digit of the result. 
Result so far: 8812.0
Subtract 1740 from 1835 to get 95.
Append the next digit (1) from the dividend to 95 and continue with: 951 / 870

Let's proceed to step 8:
The number 870 fits into 951 1 times, leaving a remainder of 81.
The next digit of our result is 1. 
Result so far: 88121.0
Subtracting 870 from 951 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 9:
870 can be fit into 810 0 times, resulting in a remainder of 810.
The next digit of our result is 0. 
Result so far: 88121.0
If we subtract 0 from 810, we get 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8100, and continue the process.

Step 10:
If we divide 8100 by 870, we get 9 and a remainder of 270.
Record the quotient 9 as the next digit in the result. 
Result so far: 88121.09
If we take 7830 away from 8100, we end up with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Advancing to step 11:
When dividing 2700 by 870, we get 3 with a remainder of 90.
Write down 3 as next digit of the result. 
Result so far: 88121.093
The remainder is 90 after subtracting 2610 from 2700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 12:
The number 870 fits into 900 1 times, leaving a remainder of 30.
The number 1 becomes the next digit in our result. 
Result so far: 88121.0931
Subtract 870 from 900 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 13:
When dividing 300 by 870, we get 0 with a remainder of 300.
Use 0 as the next digit of our solution. 
Result so far: 88121.0931
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 14:
870 can be fit into 3000 3 times, resulting in a remainder of 390.
Record the quotient 3 as the next digit in the result. 
Result so far: 88121.093103
Subtract 2610 from 3000 to get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Moving on to step 15:
3900 divided by 870 is 4 with a remainder of 420.
Write down 4 as next digit of the result. 
Result so far: 88121.0931034
Subtract 3480 from 3900 to get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Going ahead to step 16:
When dividing 4200 by 870, we get 4 with a remainder of 720.
Write down 4 as next digit of the result. 
Result so far: 88121.09310344
The remainder is 720 after subtracting 3480 from 4200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

After the division, we end up with 88121.09310344 and a remainder of 7.2e-07.