86150519 divided by 643 
We want to divide 86150519 by 643.

Step 1:
When dividing 8 by 643, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 643

Let's proceed to step 2:
When dividing 86 by 643, we get 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 643

Going ahead to step 3:
643 goes into 861 1 times with a remainder of 218.
The next digit of our result is 1. 
Result so far: 1.0
If we take 643 away from 861, we end up with 218.
Include the next digit (5) from the dividend after 218, then repeat: 2185 / 643

Let's proceed to step 4:
The number 643 fits into 2185 3 times, leaving a remainder of 256.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we take 1929 away from 2185, we end up with 256.
Bring next digit (0) of the dividend behind the 256 and repeat the process: 2560 / 643

Step 5:
2560 divided by 643 is 3 with a remainder of 631.
Put 3 as the next digit of the answer. 
Result so far: 133.0
If we take 1929 away from 2560, we end up with 631.
Take the next digit (5) from the dividend and append it to 631, then repeat: 6315 / 643

Step 6:
643 can be fit into 6315 9 times, resulting in a remainder of 528.
Record the quotient 9 as the next digit in the result. 
Result so far: 1339.0
Subtract 5787 from 6315 to get 528.
Append the next digit (1) from the dividend to 528 and continue with: 5281 / 643

Moving on to step 7:
If we divide 5281 by 643, we get 8 and a remainder of 137.
The number 8 becomes the next digit in our result. 
Result so far: 13398.0
The remainder is 137 after subtracting 5144 from 5281.
Bring next digit (9) of the dividend behind the 137 and repeat the process: 1379 / 643

Moving on to step 8:
When dividing 1379 by 643, we get 2 with a remainder of 93.
The next digit of our result is 2. 
Result so far: 133982.0
Deduct 1286 from 1379 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Let's proceed to step 9:
643 can be fit into 930 1 times, resulting in a remainder of 287.
Record the quotient 1 as the next digit in the result. 
Result so far: 133982.1
Deduct 643 from 930 and we're left with 287.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2870, and continue the process.

Let's proceed to step 10:
The number 643 fits into 2870 4 times, leaving a remainder of 298.
Put 4 as the next digit of the answer. 
Result so far: 133982.14
The remainder is 298 after subtracting 2572 from 2870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Let's proceed to step 11:
When dividing 2980 by 643, we get 4 with a remainder of 408.
Write down 4 as next digit of the result. 
Result so far: 133982.144
Subtract 2572 from 2980 to get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

After the division, we end up with 133982.144 and a remainder of 0.0408.