54406064 ÷ 639 
We're looking to find how many times 639 goes into 54406064.

Advancing to step 1:
The number 639 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 639

On to step 2:
54 divided by 639 is 0 with a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 54 to get 54.
Grab the next digit (4) from the dividend, add it to 54, then carry on: 544 / 639

Let's proceed to step 3:
If we divide 544 by 639, we get 0 and a remainder of 544.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 544 leaves us with 544.
Bring next digit (0) of the dividend behind the 544 and repeat the process: 5440 / 639

Moving on to step 4:
The number 639 fits into 5440 8 times, leaving a remainder of 328.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 5112 from 5440, we get 328.
Include the next digit (6) from the dividend after 328, then repeat: 3286 / 639

Let's proceed to step 5:
If we divide 3286 by 639, we get 5 and a remainder of 91.
Write down 5 as next digit of the result. 
Result so far: 85.0
The remainder is 91 after subtracting 3195 from 3286.
Append the next digit (0) from the dividend to 91 and continue with: 910 / 639

On to step 6:
910 divided by 639 is 1 with a remainder of 271.
The number 1 becomes the next digit in our result. 
Result so far: 851.0
If we subtract 639 from 910, we get 271.
Append the next digit (6) from the dividend to 271 and continue with: 2716 / 639

On to step 7:
2716 divided by 639 is 4 with a remainder of 160.
Use 4 as the next digit of our solution. 
Result so far: 8514.0
Subtract 2556 from 2716 to get 160.
Include the next digit (4) from the dividend after 160, then repeat: 1604 / 639

Step 8:
When dividing 1604 by 639, we get 2 with a remainder of 326.
The next digit of our result is 2. 
Result so far: 85142.0
The remainder is 326 after subtracting 1278 from 1604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

On to step 9:
The number 639 fits into 3260 5 times, leaving a remainder of 65.
The number 5 becomes the next digit in our result. 
Result so far: 85142.5
Deduct 3195 from 3260 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 10:
The number 639 fits into 650 1 times, leaving a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 85142.51
Deduct 639 from 650 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 11:
639 goes into 110 0 times with a remainder of 110.
Write down 0 as next digit of the result. 
Result so far: 85142.51
Deduct 0 from 110 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Moving on to step 12:
If we divide 1100 by 639, we get 1 and a remainder of 461.
Use 1 as the next digit of our solution. 
Result so far: 85142.5101
The remainder is 461 after subtracting 639 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

Step 13:
639 can be fit into 4610 7 times, resulting in a remainder of 137.
The number 7 becomes the next digit in our result. 
Result so far: 85142.51017
If we take 4473 away from 4610, we end up with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Going ahead to step 14:
The number 639 fits into 1370 2 times, leaving a remainder of 92.
The next digit of our result is 2. 
Result so far: 85142.510172
Subtract 1278 from 1370 to 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.

Moving on to step 15:
920 divided by 639 is 1 with a remainder of 281.
The number 1 becomes the next digit in our result. 
Result so far: 85142.5101721
Subtracting 639 from 920 leaves us with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

On to step 16:
639 goes into 2810 4 times with a remainder of 254.
Record the quotient 4 as the next digit in the result. 
Result so far: 85142.51017214
Subtract 2556 from 2810 to get 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

The final outcome is 85142.51017214, with a leftover of 2.54e-07.