4017862 ÷ 643 
We're looking to find how many times 643 goes into 4017862.

Moving on to step 1:
643 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 643

Advancing to step 2:
When dividing 40 by 643, we get 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 40 and we're left with 40.
Include the next digit (1) from the dividend after 40, then repeat: 401 / 643

Moving on to step 3:
643 goes into 401 0 times with a remainder of 401.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 401 and we're left with 401.
Take the next digit (7) from the dividend and append it to 401, then repeat: 4017 / 643

Going ahead to step 4:
When dividing 4017 by 643, we get 6 with a remainder of 159.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 159 after subtracting 3858 from 4017.
Bring next digit (8) of the dividend behind the 159 and repeat the process: 1598 / 643

Moving on to step 5:
If we divide 1598 by 643, we get 2 and a remainder of 312.
The next digit of our result is 2. 
Result so far: 62.0
The remainder is 312 after subtracting 1286 from 1598.
Bring next digit (6) of the dividend behind the 312 and repeat the process: 3126 / 643

Let's proceed to step 6:
643 goes into 3126 4 times with a remainder of 554.
Put 4 as the next digit of the answer. 
Result so far: 624.0
If we take 2572 away from 3126, we end up with 554.
Append the next digit (2) from the dividend to 554 and continue with: 5542 / 643

Step 7:
643 can be fit into 5542 8 times, resulting in a remainder of 398.
The number 8 becomes the next digit in our result. 
Result so far: 6248.0
If we subtract 5144 from 5542, we get 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Step 8:
The number 643 fits into 3980 6 times, leaving a remainder of 122.
Use 6 as the next digit of our solution. 
Result so far: 6248.6
Subtract 3858 from 3980 to get 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Going ahead to step 9:
When dividing 1220 by 643, we get 1 with a remainder of 577.
Use 1 as the next digit of our solution. 
Result so far: 6248.61
Subtracting 643 from 1220 leaves us with 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Step 10:
5770 divided by 643 is 8 with a remainder of 626.
The number 8 becomes the next digit in our result. 
Result so far: 6248.618
If we take 5144 away from 5770, we end up with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Let's proceed to step 11:
When dividing 6260 by 643, we get 9 with a remainder of 473.
Put 9 as the next digit of the answer. 
Result so far: 6248.6189
If we take 5787 away from 6260, we end up with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Going ahead to step 12:
643 goes into 4730 7 times with a remainder of 229.
Write down 7 as next digit of the result. 
Result so far: 6248.61897
If we subtract 4501 from 4730, we get 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

Going ahead to step 13:
643 can be fit into 2290 3 times, resulting in a remainder of 361.
Write down 3 as next digit of the result. 
Result so far: 6248.618973
Deduct 1929 from 2290 and we're left with 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

On to step 14:
If we divide 3610 by 643, we get 5 and a remainder of 395.
Write down 5 as next digit of the result. 
Result so far: 6248.6189735
Deduct 3215 from 3610 and we're left with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

On to step 15:
The number 643 fits into 3950 6 times, leaving a remainder of 92.
Record the quotient 6 as the next digit in the result. 
Result so far: 6248.61897356
If we subtract 3858 from 3950, we get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

The final result is 6248.61897356 with a remainder of 9.2e-08.