Let's divide 63158855 by 639
We want to figure out the number of times 63158855 can be divided by 639.

Step 1:
When dividing 6 by 639, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 639

Advancing to step 2:
When dividing 63 by 639, we get 0 with a remainder of 63.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Take the next digit (1) from the dividend and append it to 63, then repeat: 631 / 639

On to step 3:
When dividing 631 by 639, we get 0 with a remainder of 631.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 631, we get 631.
Append the next digit (5) from the dividend to 631 and continue with: 6315 / 639

Step 4:
The number 639 fits into 6315 9 times, leaving a remainder of 564.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtract 5751 from 6315 to get 564.
Append the next digit (8) from the dividend to 564 and continue with: 5648 / 639

Going ahead to step 5:
The number 639 fits into 5648 8 times, leaving a remainder of 536.
The next digit of our result is 8. 
Result so far: 98.0
Subtract 5112 from 5648 to get 536.
Append the next digit (8) from the dividend to 536 and continue with: 5368 / 639

On to step 6:
639 goes into 5368 8 times with a remainder of 256.
Put 8 as the next digit of the answer. 
Result so far: 988.0
Deduct 5112 from 5368 and we're left with 256.
Take the next digit (5) from the dividend and append it to 256, then repeat: 2565 / 639

Let's proceed to step 7:
If we divide 2565 by 639, we get 4 and a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 9884.0
Deduct 2556 from 2565 and we're left with 9.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 639

Moving on to step 8:
If we divide 95 by 639, we get 0 and a remainder of 95.
The next digit of our result is 0. 
Result so far: 98840.0
If we subtract 0 from 95, we get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Moving on to step 9:
The number 639 fits into 950 1 times, leaving a remainder of 311.
Use 1 as the next digit of our solution. 
Result so far: 98840.1
Deduct 639 from 950 and we're left with 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Advancing to step 10:
639 can be fit into 3110 4 times, resulting in a remainder of 554.
The next digit of our result is 4. 
Result so far: 98840.14
If we take 2556 away from 3110, we end up with 554.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5540, and continue the process.

Advancing to step 11:
639 can be fit into 5540 8 times, resulting in a remainder of 428.
Use 8 as the next digit of our solution. 
Result so far: 98840.148
The remainder is 428 after subtracting 5112 from 5540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Let's proceed to step 12:
4280 divided by 639 is 6 with a remainder of 446.
Put 6 as the next digit of the answer. 
Result so far: 98840.1486
If we subtract 3834 from 4280, we get 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

Step 13:
4460 divided by 639 is 6 with a remainder of 626.
The next digit of our result is 6. 
Result so far: 98840.14866
Subtract 3834 from 4460 to get 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

The final outcome is 98840.14866, with a leftover of 0.000626.