54806801 ÷ 642 
We want to divide 54806801 by 642.

Going ahead to step 1:
642 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 642

Advancing to step 2:
642 goes into 54 0 times with a remainder of 54.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 54 after subtracting 0 from 54.
Fetch the next digit (8) from the dividend, attach it to 54 and continue: 548 / 642

Advancing to step 3:
The number 642 fits into 548 0 times, leaving a remainder of 548.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 548 to get 548.
Bring next digit (0) of the dividend behind the 548 and repeat the process: 5480 / 642

Advancing to step 4:
If we divide 5480 by 642, we get 8 and a remainder of 344.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 5136 from 5480 and we're left with 344.
Bring next digit (6) of the dividend behind the 344 and repeat the process: 3446 / 642

Step 5:
The number 642 fits into 3446 5 times, leaving a remainder of 236.
The next digit of our result is 5. 
Result so far: 85.0
Subtracting 3210 from 3446 leaves us with 236.
Take the next digit (8) from the dividend and append it to 236, then repeat: 2368 / 642

Step 6:
The number 642 fits into 2368 3 times, leaving a remainder of 442.
The number 3 becomes the next digit in our result. 
Result so far: 853.0
Subtracting 1926 from 2368 leaves us with 442.
Bring next digit (0) of the dividend behind the 442 and repeat the process: 4420 / 642

Advancing to step 7:
If we divide 4420 by 642, we get 6 and a remainder of 568.
Put 6 as the next digit of the answer. 
Result so far: 8536.0
If we take 3852 away from 4420, we end up with 568.
Bring next digit (1) of the dividend behind the 568 and repeat the process: 5681 / 642

Moving on to step 8:
When dividing 5681 by 642, we get 8 with a remainder of 545.
Put 8 as the next digit of the answer. 
Result so far: 85368.0
The remainder is 545 after subtracting 5136 from 5681.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Let's proceed to step 9:
5450 divided by 642 is 8 with a remainder of 314.
Put 8 as the next digit of the answer. 
Result so far: 85368.8
Deduct 5136 from 5450 and we're left with 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Let's proceed to step 10:
3140 divided by 642 is 4 with a remainder of 572.
The number 4 becomes the next digit in our result. 
Result so far: 85368.84
Subtract 2568 from 3140 to get 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Moving on to step 11:
642 can be fit into 5720 8 times, resulting in a remainder of 584.
Use 8 as the next digit of our solution. 
Result so far: 85368.848
Deduct 5136 from 5720 and we're left with 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Going ahead to step 12:
642 can be fit into 5840 9 times, resulting in a remainder of 62.
Record the quotient 9 as the next digit in the result. 
Result so far: 85368.8489
The remainder is 62 after subtracting 5778 from 5840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 13:
The number 642 fits into 620 0 times, leaving a remainder of 620.
Put 0 as the next digit of the answer. 
Result so far: 85368.8489
If we take 0 away from 620, we end up with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Advancing to step 14:
When dividing 6200 by 642, we get 9 with a remainder of 422.
Record the quotient 9 as the next digit in the result. 
Result so far: 85368.848909
If we take 5778 away from 6200, we end up with 422.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

Step 15:
The number 642 fits into 4220 6 times, leaving a remainder of 368.
The next digit of our result is 6. 
Result so far: 85368.8489096
If we subtract 3852 from 4220, we get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Advancing to step 16:
When dividing 3680 by 642, we get 5 with a remainder of 470.
Put 5 as the next digit of the answer. 
Result so far: 85368.84890965
Subtract 3210 from 3680 to get 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

The final result is 85368.84890965 with a remainder of 4.7e-07.