We divide 78236856 by 643
Our goal is to divide 78236856 by 643.

Step 1:
643 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 643

Advancing to step 2:
If we divide 78 by 643, we get 0 and a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Include the next digit (2) from the dividend after 78, then repeat: 782 / 643

Going ahead to step 3:
643 goes into 782 1 times with a remainder of 139.
The next digit of our result is 1. 
Result so far: 1.0
If we take 643 away from 782, we end up with 139.
Take the next digit (3) from the dividend and append it to 139, then repeat: 1393 / 643

On to step 4:
1393 divided by 643 is 2 with a remainder of 107.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
The remainder is 107 after subtracting 1286 from 1393.
Take the next digit (6) from the dividend and append it to 107, then repeat: 1076 / 643

Step 5:
1076 divided by 643 is 1 with a remainder of 433.
The next digit of our result is 1. 
Result so far: 121.0
Subtract 643 from 1076 to get 433.
Include the next digit (8) from the dividend after 433, then repeat: 4338 / 643

Going ahead to step 6:
If we divide 4338 by 643, we get 6 and a remainder of 480.
Write down 6 as next digit of the result. 
Result so far: 1216.0
If we take 3858 away from 4338, we end up with 480.
Bring next digit (5) of the dividend behind the 480 and repeat the process: 4805 / 643

Let's proceed to step 7:
If we divide 4805 by 643, we get 7 and a remainder of 304.
The next digit of our result is 7. 
Result so far: 12167.0
If we subtract 4501 from 4805, we get 304.
Include the next digit (6) from the dividend after 304, then repeat: 3046 / 643

Going ahead to step 8:
When dividing 3046 by 643, we get 4 with a remainder of 474.
Use 4 as the next digit of our solution. 
Result so far: 121674.0
If we subtract 2572 from 3046, we get 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Going ahead to step 9:
643 goes into 4740 7 times with a remainder of 239.
Put 7 as the next digit of the answer. 
Result so far: 121674.7
Subtracting 4501 from 4740 leaves us with 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Advancing to step 10:
When dividing 2390 by 643, we get 3 with a remainder of 461.
The number 3 becomes the next digit in our result. 
Result so far: 121674.73
Subtracting 1929 from 2390 leaves us with 461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

On to step 11:
If we divide 4610 by 643, we get 7 and a remainder of 109.
Write down 7 as next digit of the result. 
Result so far: 121674.737
If we subtract 4501 from 4610, we get 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Let's proceed to step 12:
When dividing 1090 by 643, we get 1 with a remainder of 447.
The number 1 becomes the next digit in our result. 
Result so far: 121674.7371
If we subtract 643 from 1090, we get 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

Going ahead to step 13:
The number 643 fits into 4470 6 times, leaving a remainder of 612.
Record the quotient 6 as the next digit in the result. 
Result so far: 121674.73716
Subtracting 3858 from 4470 leaves us with 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

Advancing to step 14:
6120 divided by 643 is 9 with a remainder of 333.
The number 9 becomes the next digit in our result. 
Result so far: 121674.737169
Subtracting 5787 from 6120 leaves us with 333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

Let's proceed to step 15:
3330 divided by 643 is 5 with a remainder of 115.
Record the quotient 5 as the next digit in the result. 
Result so far: 121674.7371695
The remainder is 115 after subtracting 3215 from 3330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

On to step 16:
When dividing 1150 by 643, we get 1 with a remainder of 507.
The next digit of our result is 1. 
Result so far: 121674.73716951
Subtracting 643 from 1150 leaves us with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

The final outcome is 121674.73716951, with a leftover of 5.07e-07.