78133095 divided by 643 
We want to divide 78133095 by 643.

Moving on to step 1:
7 divided by 643 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 643

Going ahead to step 2:
643 can be fit into 78 0 times, resulting in a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Include the next digit (1) from the dividend after 78, then repeat: 781 / 643

On to step 3:
781 divided by 643 is 1 with a remainder of 138.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 643 from 781, we get 138.
Include the next digit (3) from the dividend after 138, then repeat: 1383 / 643

On to step 4:
When dividing 1383 by 643, we get 2 with a remainder of 97.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 1286 from 1383 and we're left with 97.
Take the next digit (3) from the dividend and append it to 97, then repeat: 973 / 643

Advancing to step 5:
The number 643 fits into 973 1 times, leaving a remainder of 330.
Use 1 as the next digit of our solution. 
Result so far: 121.0
Deduct 643 from 973 and we're left with 330.
Fetch the next digit (0) from the dividend, attach it to 330 and continue: 3300 / 643

Let's proceed to step 6:
When dividing 3300 by 643, we get 5 with a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 1215.0
The remainder is 85 after subtracting 3215 from 3300.
Include the next digit (9) from the dividend after 85, then repeat: 859 / 643

On to step 7:
643 goes into 859 1 times with a remainder of 216.
Record the quotient 1 as the next digit in the result. 
Result so far: 12151.0
Subtract 643 from 859 to get 216.
Bring next digit (5) of the dividend behind the 216 and repeat the process: 2165 / 643

On to step 8:
When dividing 2165 by 643, we get 3 with a remainder of 236.
The number 3 becomes the next digit in our result. 
Result so far: 121513.0
The remainder is 236 after subtracting 1929 from 2165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Let's proceed to step 9:
2360 divided by 643 is 3 with a remainder of 431.
Record the quotient 3 as the next digit in the result. 
Result so far: 121513.3
The remainder is 431 after subtracting 1929 from 2360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

Step 10:
If we divide 4310 by 643, we get 6 and a remainder of 452.
Write down 6 as next digit of the result. 
Result so far: 121513.36
Deduct 3858 from 4310 and we're left with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Advancing to step 11:
When dividing 4520 by 643, we get 7 with a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 121513.367
If we take 4501 away from 4520, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 12:
643 goes into 190 0 times with a remainder of 190.
The next digit of our result is 0. 
Result so far: 121513.367
If we subtract 0 from 190, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Advancing to step 13:
If we divide 1900 by 643, we get 2 and a remainder of 614.
Put 2 as the next digit of the answer. 
Result so far: 121513.36702
The remainder is 614 after subtracting 1286 from 1900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6140, and continue the process.

Step 14:
If we divide 6140 by 643, we get 9 and a remainder of 353.
The number 9 becomes the next digit in our result. 
Result so far: 121513.367029
Subtracting 5787 from 6140 leaves us with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Step 15:
643 goes into 3530 5 times with a remainder of 315.
Record the quotient 5 as the next digit in the result. 
Result so far: 121513.3670295
Deduct 3215 from 3530 and we're left with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Moving on to step 16:
643 goes into 3150 4 times with a remainder of 578.
The next digit of our result is 4. 
Result so far: 121513.36702954
Deduct 2572 from 3150 and we're left with 578.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5780, and continue the process.

After the division, we end up with 121513.36702954 and a remainder of 5.78e-07.