97878172 divided by 638 
Let's see how many times 638 fits into 97878172.

Step 1:
638 goes into 9 0 times with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 638

Moving on to step 2:
When dividing 97 by 638, we get 0 with a remainder of 97.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 97 and we're left with 97.
Bring next digit (8) of the dividend behind the 97 and repeat the process: 978 / 638

Moving on to step 3:
When dividing 978 by 638, we get 1 with a remainder of 340.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 638 from 978 and we're left with 340.
Fetch the next digit (7) from the dividend, attach it to 340 and continue: 3407 / 638

On to step 4:
638 goes into 3407 5 times with a remainder of 217.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
The remainder is 217 after subtracting 3190 from 3407.
Append the next digit (8) from the dividend to 217 and continue with: 2178 / 638

Going ahead to step 5:
When dividing 2178 by 638, we get 3 with a remainder of 264.
The next digit of our result is 3. 
Result so far: 153.0
If we take 1914 away from 2178, we end up with 264.
Grab the next digit (1) from the dividend, add it to 264, then carry on: 2641 / 638

Moving on to step 6:
If we divide 2641 by 638, we get 4 and a remainder of 89.
The next digit of our result is 4. 
Result so far: 1534.0
The remainder is 89 after subtracting 2552 from 2641.
Fetch the next digit (7) from the dividend, attach it to 89 and continue: 897 / 638

Going ahead to step 7:
The number 638 fits into 897 1 times, leaving a remainder of 259.
Write down 1 as next digit of the result. 
Result so far: 15341.0
Deduct 638 from 897 and we're left with 259.
Bring next digit (2) of the dividend behind the 259 and repeat the process: 2592 / 638

Going ahead to step 8:
If we divide 2592 by 638, we get 4 and a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 153414.0
If we take 2552 away from 2592, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 9:
The number 638 fits into 400 0 times, leaving a remainder of 400.
The next digit of our result is 0. 
Result so far: 153414.0
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 10:
4000 divided by 638 is 6 with a remainder of 172.
The number 6 becomes the next digit in our result. 
Result so far: 153414.06
If we subtract 3828 from 4000, we get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Moving on to step 11:
638 can be fit into 1720 2 times, resulting in a remainder of 444.
Use 2 as the next digit of our solution. 
Result so far: 153414.062
Deduct 1276 from 1720 and we're left with 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

On to step 12:
638 can be fit into 4440 6 times, resulting in a remainder of 612.
The next digit of our result is 6. 
Result so far: 153414.0626
Subtracting 3828 from 4440 leaves us with 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

Step 13:
6120 divided by 638 is 9 with a remainder of 378.
Use 9 as the next digit of our solution. 
Result so far: 153414.06269
Subtracting 5742 from 6120 leaves us with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Moving on to step 14:
If we divide 3780 by 638, we get 5 and a remainder of 590.
Use 5 as the next digit of our solution. 
Result so far: 153414.062695
Deduct 3190 from 3780 and we're left with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Moving on to step 15:
When dividing 5900 by 638, we get 9 with a remainder of 158.
Put 9 as the next digit of the answer. 
Result so far: 153414.0626959
Subtract 5742 from 5900 to get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Advancing to step 16:
638 can be fit into 1580 2 times, resulting in a remainder of 304.
Put 2 as the next digit of the answer. 
Result so far: 153414.06269592
Subtracting 1276 from 1580 leaves us with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

The final outcome is 153414.06269592, with a leftover of 3.04e-07.