We're dividing 78302997 by 486 
We want to figure out the number of times 78302997 can be divided by 486.

On to step 1:
The number 486 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 486

On to step 2:
486 goes into 78 0 times with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Take the next digit (3) from the dividend and append it to 78, then repeat: 783 / 486

Advancing to step 3:
If we divide 783 by 486, we get 1 and a remainder of 297.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 297 after subtracting 486 from 783.
Grab the next digit (0) from the dividend, add it to 297, then carry on: 2970 / 486

Going ahead to step 4:
The number 486 fits into 2970 6 times, leaving a remainder of 54.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
The remainder is 54 after subtracting 2916 from 2970.
Include the next digit (2) from the dividend after 54, then repeat: 542 / 486

On to step 5:
486 can be fit into 542 1 times, resulting in a remainder of 56.
The next digit of our result is 1. 
Result so far: 161.0
If we subtract 486 from 542, we get 56.
Take the next digit (9) from the dividend and append it to 56, then repeat: 569 / 486

Step 6:
The number 486 fits into 569 1 times, leaving a remainder of 83.
Put 1 as the next digit of the answer. 
Result so far: 1611.0
Subtract 486 from 569 to get 83.
Grab the next digit (9) from the dividend, add it to 83, then carry on: 839 / 486

Moving on to step 7:
If we divide 839 by 486, we get 1 and a remainder of 353.
Record the quotient 1 as the next digit in the result. 
Result so far: 16111.0
If we subtract 486 from 839, we get 353.
Bring next digit (7) of the dividend behind the 353 and repeat the process: 3537 / 486

Advancing to step 8:
486 can be fit into 3537 7 times, resulting in a remainder of 135.
The next digit of our result is 7. 
Result so far: 161117.0
The remainder is 135 after subtracting 3402 from 3537.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Moving on to step 9:
486 goes into 1350 2 times with a remainder of 378.
Record the quotient 2 as the next digit in the result. 
Result so far: 161117.2
If we take 972 away from 1350, we end up 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.

Let's proceed to step 10:
When dividing 3780 by 486, we get 7 with a remainder of 378.
Write down 7 as next digit of the result. 
Result so far: 161117.27
Subtracting 3402 from 3780 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.

Step 11:
If we divide 3780 by 486, we get 7 and a remainder of 378.
The number 7 becomes the next digit in our result. 
Result so far: 161117.277
If we take 3402 away from 3780, we end up 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.

After the division, we end up with 161117.277 and a remainder of 0.0378.