78817915 divided by 669 
We want to divide 78817915 by 669.

Going ahead to step 1:
7 divided by 669 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 669

Advancing to step 2:
669 can be fit into 78 0 times, resulting in a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Fetch the next digit (8) from the dividend, attach it to 78 and continue: 788 / 669

Advancing to step 3:
The number 669 fits into 788 1 times, leaving a remainder of 119.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 119 after subtracting 669 from 788.
Include the next digit (1) from the dividend after 119, then repeat: 1191 / 669

Step 4:
669 goes into 1191 1 times with a remainder of 522.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we subtract 669 from 1191, we get 522.
Fetch the next digit (7) from the dividend, attach it to 522 and continue: 5227 / 669

Going ahead to step 5:
5227 divided by 669 is 7 with a remainder of 544.
The next digit of our result is 7. 
Result so far: 117.0
Subtract 4683 from 5227 to get 544.
Fetch the next digit (9) from the dividend, attach it to 544 and continue: 5449 / 669

Moving on to step 6:
If we divide 5449 by 669, we get 8 and a remainder of 97.
Write down 8 as next digit of the result. 
Result so far: 1178.0
If we take 5352 away from 5449, we end up with 97.
Bring next digit (1) of the dividend behind the 97 and repeat the process: 971 / 669

Step 7:
971 divided by 669 is 1 with a remainder of 302.
The number 1 becomes the next digit in our result. 
Result so far: 11781.0
If we take 669 away from 971, we end up with 302.
Fetch the next digit (5) from the dividend, attach it to 302 and continue: 3025 / 669

Let's proceed to step 8:
669 goes into 3025 4 times with a remainder of 349.
Record the quotient 4 as the next digit in the result. 
Result so far: 117814.0
Deduct 2676 from 3025 and we're left with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Going ahead to step 9:
If we divide 3490 by 669, we get 5 and a remainder of 145.
Write down 5 as next digit of the result. 
Result so far: 117814.5
Deduct 3345 from 3490 and we're left with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 10:
The number 669 fits into 1450 2 times, leaving a remainder of 112.
The number 2 becomes the next digit in our result. 
Result so far: 117814.52
The remainder is 112 after subtracting 1338 from 1450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Step 11:
When dividing 1120 by 669, we get 1 with a remainder of 451.
Use 1 as the next digit of our solution. 
Result so far: 117814.521
If we subtract 669 from 1120, we get 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

Moving on to step 12:
If we divide 4510 by 669, we get 6 and a remainder of 496.
Record the quotient 6 as the next digit in the result. 
Result so far: 117814.5216
Subtract 4014 from 4510 to get 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Let's proceed to step 13:
When dividing 4960 by 669, we get 7 with a remainder of 277.
Use 7 as the next digit of our solution. 
Result so far: 117814.52167
The remainder is 277 after subtracting 4683 from 4960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Advancing to step 14:
669 can be fit into 2770 4 times, resulting in a remainder of 94.
Put 4 as the next digit of the answer. 
Result so far: 117814.521674
The remainder is 94 after subtracting 2676 from 2770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Moving on to step 15:
940 divided by 669 is 1 with a remainder of 271.
The number 1 becomes the next digit in our result. 
Result so far: 117814.5216741
If we take 669 away from 940, we end up with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Advancing to step 16:
If we divide 2710 by 669, we get 4 and a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 117814.52167414
If we take 2676 away from 2710, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

In conclusion, the division gives 117814.52167414 with a balance of 3.4e-08.