We look at the division of 77170102 by 815 
We want to figure out the number of times 77170102 can be divided by 815.

Let's proceed to step 1:
815 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 815

Going ahead to step 2:
77 divided by 815 is 0 with 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.
Append the next digit (1) from the dividend to 77 and continue with: 771 / 815

Step 3:
If we divide 771 by 815, we get 0 and a remainder of 771.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 771 to get 771.
Bring next digit (7) of the dividend behind the 771 and repeat the process: 7717 / 815

Moving on to step 4:
815 can be fit into 7717 9 times, resulting in a remainder of 382.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 7335 from 7717, we get 382.
Fetch the next digit (0) from the dividend, attach it to 382 and continue: 3820 / 815

Step 5:
The number 815 fits into 3820 4 times, leaving a remainder of 560.
The number 4 becomes the next digit in our result. 
Result so far: 94.0
The remainder is 560 after subtracting 3260 from 3820.
Append the next digit (1) from the dividend to 560 and continue with: 5601 / 815

Advancing to step 6:
815 can be fit into 5601 6 times, resulting in a remainder of 711.
Put 6 as the next digit of the answer. 
Result so far: 946.0
Deduct 4890 from 5601 and we're left with 711.
Bring next digit (0) of the dividend behind the 711 and repeat the process: 7110 / 815

Advancing to step 7:
The number 815 fits into 7110 8 times, leaving a remainder of 590.
The number 8 becomes the next digit in our result. 
Result so far: 9468.0
Subtracting 6520 from 7110 leaves us with 590.
Take the next digit (2) from the dividend and append it to 590, then repeat: 5902 / 815

Moving on to step 8:
The number 815 fits into 5902 7 times, leaving a remainder of 197.
Put 7 as the next digit of the answer. 
Result so far: 94687.0
The remainder is 197 after subtracting 5705 from 5902.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Advancing to step 9:
The number 815 fits into 1970 2 times, leaving a remainder of 340.
Put 2 as the next digit of the answer. 
Result so far: 94687.2
Subtract 1630 from 1970 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.

Moving on to step 10:
When dividing 3400 by 815, we get 4 with a remainder of 140.
Put 4 as the next digit of the answer. 
Result so far: 94687.24
Subtract 3260 from 3400 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 11:
The number 815 fits into 1400 1 times, leaving a remainder of 585.
Put 1 as the next digit of the answer. 
Result so far: 94687.241
The remainder is 585 after subtracting 815 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Step 12:
5850 divided by 815 is 7 with a remainder of 145.
Put 7 as the next digit of the answer. 
Result so far: 94687.2417
Subtract 5705 from 5850 to get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Let's proceed to step 13:
If we divide 1450 by 815, we get 1 and a remainder of 635.
The number 1 becomes the next digit in our result. 
Result so far: 94687.24171
The remainder is 635 after subtracting 815 from 1450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

Let's proceed to step 14:
If we divide 6350 by 815, we get 7 and a remainder of 645.
Record the quotient 7 as the next digit in the result. 
Result so far: 94687.241717
Deduct 5705 from 6350 and we're left with 645.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6450, and continue the process.

Let's proceed to step 15:
If we divide 6450 by 815, we get 7 and a remainder of 745.
The next digit of our result is 7. 
Result so far: 94687.2417177
Subtracting 5705 from 6450 leaves us with 745.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7450, and continue the process.

The final outcome is 94687.2417177, with a leftover of 7.45e-06.