78938007 divided by 642 
We're looking to find how many times 642 goes into 78938007.

On to step 1:
The number 642 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 642

On to step 2:
642 goes into 78 0 times with a remainder of 78.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Fetch the next digit (9) from the dividend, attach it to 78 and continue: 789 / 642

Moving on to step 3:
789 divided by 642 is 1 with a remainder of 147.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 642 from 789, we get 147.
Fetch the next digit (3) from the dividend, attach it to 147 and continue: 1473 / 642

Step 4:
642 goes into 1473 2 times with a remainder of 189.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 189 after subtracting 1284 from 1473.
Append the next digit (8) from the dividend to 189 and continue with: 1898 / 642

Advancing to step 5:
The number 642 fits into 1898 2 times, leaving a remainder of 614.
Use 2 as the next digit of our solution. 
Result so far: 122.0
If we take 1284 away from 1898, we end up with 614.
Append the next digit (0) from the dividend to 614 and continue with: 6140 / 642

Going ahead to step 6:
642 can be fit into 6140 9 times, resulting in a remainder of 362.
Use 9 as the next digit of our solution. 
Result so far: 1229.0
If we subtract 5778 from 6140, we get 362.
Include the next digit (0) from the dividend after 362, then repeat: 3620 / 642

On to step 7:
642 can be fit into 3620 5 times, resulting in a remainder of 410.
The next digit of our result is 5. 
Result so far: 12295.0
Subtracting 3210 from 3620 leaves us with 410.
Take the next digit (7) from the dividend and append it to 410, then repeat: 4107 / 642

Step 8:
4107 divided by 642 is 6 with a remainder of 255.
Write down 6 as next digit of the result. 
Result so far: 122956.0
Subtract 3852 from 4107 to get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Let's proceed to step 9:
The number 642 fits into 2550 3 times, leaving a remainder of 624.
Use 3 as the next digit of our solution. 
Result so far: 122956.3
The remainder is 624 after subtracting 1926 from 2550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Advancing to step 10:
If we divide 6240 by 642, we get 9 and a remainder of 462.
The number 9 becomes the next digit in our result. 
Result so far: 122956.39
Subtract 5778 from 6240 to get 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Let's proceed to step 11:
If we divide 4620 by 642, we get 7 and a remainder of 126.
Record the quotient 7 as the next digit in the result. 
Result so far: 122956.397
If we take 4494 away from 4620, we end up with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Going ahead to step 12:
642 can be fit into 1260 1 times, resulting in a remainder of 618.
Record the quotient 1 as the next digit in the result. 
Result so far: 122956.3971
Deduct 642 from 1260 and we're left with 618.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

On to step 13:
642 can be fit into 6180 9 times, resulting in a remainder of 402.
The next digit of our result is 9. 
Result so far: 122956.39719
If we take 5778 away from 6180, we end up with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Let's proceed to step 14:
642 can be fit into 4020 6 times, resulting in a remainder of 168.
Put 6 as the next digit of the answer. 
Result so far: 122956.397196
Subtracting 3852 from 4020 leaves us with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Let's proceed to step 15:
When dividing 1680 by 642, we get 2 with a remainder of 396.
Record the quotient 2 as the next digit in the result. 
Result so far: 122956.3971962
Subtract 1284 from 1680 to get 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Going ahead to step 16:
642 can be fit into 3960 6 times, resulting in a remainder of 108.
Use 6 as the next digit of our solution. 
Result so far: 122956.39719626
The remainder is 108 after subtracting 3852 from 3960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

The quotient of the division is 122956.39719626, and the remainder is 1.08e-07.