15427242 ÷ 643 
Let's see how many times 643 fits into 15427242.

Going ahead to step 1:
643 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 643

Let's proceed to step 2:
When dividing 15 by 643, we get 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 643

On to step 3:
When dividing 154 by 643, we get 0 with a remainder of 154.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 154 and we're left with 154.
Take the next digit (2) from the dividend and append it to 154, then repeat: 1542 / 643

Step 4:
643 goes into 1542 2 times with a remainder of 256.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 1286 from 1542 and we're left with 256.
Grab the next digit (7) from the dividend, add it to 256, then carry on: 2567 / 643

Step 5:
643 goes into 2567 3 times with a remainder of 638.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
The remainder is 638 after subtracting 1929 from 2567.
Include the next digit (2) from the dividend after 638, then repeat: 6382 / 643

Step 6:
643 goes into 6382 9 times with a remainder of 595.
The next digit of our result is 9. 
Result so far: 239.0
Subtract 5787 from 6382 to get 595.
Include the next digit (4) from the dividend after 595, then repeat: 5954 / 643

On to step 7:
The number 643 fits into 5954 9 times, leaving a remainder of 167.
The number 9 becomes the next digit in our result. 
Result so far: 2399.0
Deduct 5787 from 5954 and we're left with 167.
Bring next digit (2) of the dividend behind the 167 and repeat the process: 1672 / 643

Moving on to step 8:
643 goes into 1672 2 times with a remainder of 386.
The next digit of our result is 2. 
Result so far: 23992.0
The remainder is 386 after subtracting 1286 from 1672.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Advancing to step 9:
3860 divided by 643 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 23992.6
Deduct 3858 from 3860 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
The number 643 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 23992.6
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 11:
643 goes into 200 0 times with a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 23992.6
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 23992.6, with a leftover of 0.02.