54027012 divided by 642 
We want to divide 54027012 by 642.

On to step 1:
5 divided by 642 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 642

On to step 2:
642 goes into 54 0 times with a remainder of 54.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 54 and we're left with 54.
Bring next digit (0) of the dividend behind the 54 and repeat the process: 540 / 642

Let's proceed to step 3:
642 can be fit into 540 0 times, resulting in a remainder of 540.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 540 to get 540.
Fetch the next digit (2) from the dividend, attach it to 540 and continue: 5402 / 642

Step 4:
If we divide 5402 by 642, we get 8 and a remainder of 266.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 5136 from 5402 leaves us with 266.
Bring next digit (7) of the dividend behind the 266 and repeat the process: 2667 / 642

Going ahead to step 5:
642 can be fit into 2667 4 times, resulting in a remainder of 99.
Put 4 as the next digit of the answer. 
Result so far: 84.0
The remainder is 99 after subtracting 2568 from 2667.
Bring next digit (0) of the dividend behind the 99 and repeat the process: 990 / 642

Step 6:
990 divided by 642 is 1 with a remainder of 348.
The number 1 becomes the next digit in our result. 
Result so far: 841.0
Subtracting 642 from 990 leaves us with 348.
Append the next digit (1) from the dividend to 348 and continue with: 3481 / 642

Let's proceed to step 7:
642 goes into 3481 5 times with a remainder of 271.
Put 5 as the next digit of the answer. 
Result so far: 8415.0
Subtract 3210 from 3481 to get 271.
Take the next digit (2) from the dividend and append it to 271, then repeat: 2712 / 642

Step 8:
642 goes into 2712 4 times with a remainder of 144.
Put 4 as the next digit of the answer. 
Result so far: 84154.0
If we take 2568 away from 2712, we end up with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Advancing to step 9:
When dividing 1440 by 642, we get 2 with a remainder of 156.
Record the quotient 2 as the next digit in the result. 
Result so far: 84154.2
Subtract 1284 from 1440 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Going ahead to step 10:
If we divide 1560 by 642, we get 2 and a remainder of 276.
Write down 2 as next digit of the result. 
Result so far: 84154.22
Deduct 1284 from 1560 and we're left with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

The final outcome is 84154.22, with a leftover of 0.276.