Let's divide 78758378 by 642
We want to divide 78758378 by 642.

Moving on to step 1:
642 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 642

Let's proceed to step 2:
642 goes into 78 0 times with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Grab the next digit (7) from the dividend, add it to 78, then carry on: 787 / 642

Going ahead to step 3:
642 goes into 787 1 times with a remainder of 145.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 642 from 787 to get 145.
Include the next digit (5) from the dividend after 145, then repeat: 1455 / 642

Going ahead to step 4:
1455 divided by 642 is 2 with a remainder of 171.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtract 1284 from 1455 to get 171.
Append the next digit (8) from the dividend to 171 and continue with: 1718 / 642

Moving on to step 5:
1718 divided by 642 is 2 with a remainder of 434.
Record the quotient 2 as the next digit in the result. 
Result so far: 122.0
If we take 1284 away from 1718, we end up with 434.
Bring next digit (3) of the dividend behind the 434 and repeat the process: 4343 / 642

Let's proceed to step 6:
642 goes into 4343 6 times with a remainder of 491.
Record the quotient 6 as the next digit in the result. 
Result so far: 1226.0
If we take 3852 away from 4343, we end up with 491.
Grab the next digit (7) from the dividend, add it to 491, then carry on: 4917 / 642

Step 7:
If we divide 4917 by 642, we get 7 and a remainder of 423.
The number 7 becomes the next digit in our result. 
Result so far: 12267.0
The remainder is 423 after subtracting 4494 from 4917.
Append the next digit (8) from the dividend to 423 and continue with: 4238 / 642

Going ahead to step 8:
If we divide 4238 by 642, we get 6 and a remainder of 386.
The number 6 becomes the next digit in our result. 
Result so far: 122676.0
Subtract 3852 from 4238 to get 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Let's proceed to step 9:
3860 divided by 642 is 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 122676.6
If we take 3852 away from 3860, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 10:
The number 642 fits into 80 0 times, leaving a remainder of 80.
The next digit of our result is 0. 
Result so far: 122676.6
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 11:
800 divided by 642 is 1 with a remainder of 158.
Use 1 as the next digit of our solution. 
Result so far: 122676.601
Deduct 642 from 800 and we're left with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

On to step 12:
1580 divided by 642 is 2 with a remainder of 296.
Write down 2 as next digit of the result. 
Result so far: 122676.6012
The remainder is 296 after subtracting 1284 from 1580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

On to step 13:
642 goes into 2960 4 times with a remainder of 392.
The number 4 becomes the next digit in our result. 
Result so far: 122676.60124
Subtract 2568 from 2960 to get 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Advancing to step 14:
When dividing 3920 by 642, we get 6 with a remainder of 68.
Use 6 as the next digit of our solution. 
Result so far: 122676.601246
If we take 3852 away from 3920, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 15:
The number 642 fits into 680 1 times, leaving a remainder of 38.
Write down 1 as next digit of the result. 
Result so far: 122676.6012461
Subtract 642 from 680 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 16:
642 goes into 380 0 times with a remainder of 380.
Use 0 as the next digit of our solution. 
Result so far: 122676.6012461
Subtracting 0 from 380 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

The final outcome is 122676.6012461, with a leftover of 3.8e-07.