81150809 ÷ 123 
We're looking to find how many times 123 goes into 81150809.

Going ahead to step 1:
If we divide 8 by 123, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 123

Let's proceed to step 2:
81 divided by 123 is 0 with a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Append the next digit (1) from the dividend to 81 and continue with: 811 / 123

Going ahead to step 3:
When dividing 811 by 123, we get 6 with a remainder of 73.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtracting 738 from 811 leaves us with 73.
Take the next digit (5) from the dividend and append it to 73, then repeat: 735 / 123

On to step 4:
123 goes into 735 5 times with a remainder of 120.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
The remainder is 120 after subtracting 615 from 735.
Append the next digit (0) from the dividend to 120 and continue with: 1200 / 123

Step 5:
1200 divided by 123 is 9 with a remainder of 93.
Put 9 as the next digit of the answer. 
Result so far: 659.0
The remainder is 93 after subtracting 1107 from 1200.
Take the next digit (8) from the dividend and append it to 93, then repeat: 938 / 123

Let's proceed to step 6:
The number 123 fits into 938 7 times, leaving a remainder of 77.
Record the quotient 7 as the next digit in the result. 
Result so far: 6597.0
Subtracting 861 from 938 leaves us with 77.
Bring next digit (0) of the dividend behind the 77 and repeat the process: 770 / 123

Advancing to step 7:
If we divide 770 by 123, we get 6 and a remainder of 32.
Use 6 as the next digit of our solution. 
Result so far: 65976.0
Subtract 738 from 770 to get 32.
Bring next digit (9) of the dividend behind the 32 and repeat the process: 329 / 123

Step 8:
329 divided by 123 is 2 with a remainder of 83.
Use 2 as the next digit of our solution. 
Result so far: 659762.0
Subtracting 246 from 329 leaves us with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 9:
830 divided by 123 is 6 with a remainder of 92.
Write down 6 as next digit of the result. 
Result so far: 659762.6
If we subtract 738 from 830, we get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 10:
When dividing 920 by 123, we get 7 with a remainder of 59.
The next digit of our result is 7. 
Result so far: 659762.67
If we subtract 861 from 920, we get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 11:
123 goes into 590 4 times with a remainder of 98.
Use 4 as the next digit of our solution. 
Result so far: 659762.674
Deduct 492 from 590 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

On to step 12:
When dividing 980 by 123, we get 7 with a remainder of 119.
Use 7 as the next digit of our solution. 
Result so far: 659762.6747
Subtract 861 from 980 to get 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Going ahead to step 13:
1190 divided by 123 is 9 with a remainder of 83.
The next digit of our result is 9. 
Result so far: 659762.67479
If we subtract 1107 from 1190, we get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 14:
830 divided by 123 is 6 with a remainder of 92.
The next digit of our result is 6. 
Result so far: 659762.674796
Subtract 738 from 830 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

On to step 15:
123 goes into 920 7 times with a remainder of 59.
Use 7 as the next digit of our solution. 
Result so far: 659762.6747967
Subtract 861 from 920 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 16:
The number 123 fits into 590 4 times, leaving a remainder of 98.
Put 4 as the next digit of the answer. 
Result so far: 659762.67479674
Subtracting 492 from 590 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

After the division, we end up with 659762.67479674 and a remainder of 9.8e-08.