78420005 ÷ 506 
Our goal is to divide 78420005 by 506.

On to step 1:
506 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 506

On to step 2:
If we divide 78 by 506, we get 0 and a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Bring next digit (4) of the dividend behind the 78 and repeat the process: 784 / 506

Going ahead to step 3:
If we divide 784 by 506, we get 1 and a remainder of 278.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 278 after subtracting 506 from 784.
Take the next digit (2) from the dividend and append it to 278, then repeat: 2782 / 506

Advancing to step 4:
2782 divided by 506 is 5 with a remainder of 252.
Write down 5 as next digit of the result. 
Result so far: 15.0
Subtract 2530 from 2782 to get 252.
Grab the next digit (0) from the dividend, add it to 252, then carry on: 2520 / 506

On to step 5:
506 can be fit into 2520 4 times, resulting in a remainder of 496.
The next digit of our result is 4. 
Result so far: 154.0
If we subtract 2024 from 2520, we get 496.
Take the next digit (0) from the dividend and append it to 496, then repeat: 4960 / 506

Going ahead to step 6:
When dividing 4960 by 506, we get 9 with a remainder of 406.
The next digit of our result is 9. 
Result so far: 1549.0
Deduct 4554 from 4960 and we're left with 406.
Include the next digit (0) from the dividend after 406, then repeat: 4060 / 506

On to step 7:
506 can be fit into 4060 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 15498.0
Subtract 4048 from 4060 to get 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 506

Let's proceed to step 8:
506 goes into 125 0 times with a remainder of 125.
Record the quotient 0 as the next digit in the result. 
Result so far: 154980.0
Deduct 0 from 125 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Moving on to step 9:
1250 divided by 506 is 2 with a remainder of 238.
The next digit of our result is 2. 
Result so far: 154980.2
Deduct 1012 from 1250 and we're left with 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

Let's proceed to step 10:
506 can be fit into 2380 4 times, resulting in a remainder of 356.
The next digit of our result is 4. 
Result so far: 154980.24
Subtract 2024 from 2380 to get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Moving on to step 11:
The number 506 fits into 3560 7 times, leaving a remainder of 18.
Write down 7 as next digit of the result. 
Result so far: 154980.247
If we take 3542 away from 3560, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 12:
When dividing 180 by 506, we get 0 with a remainder of 180.
Record the quotient 0 as the next digit in the result. 
Result so far: 154980.247
Deduct 0 from 180 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 13:
If we divide 1800 by 506, we get 3 and a remainder of 282.
Put 3 as the next digit of the answer. 
Result so far: 154980.24703
Subtract 1518 from 1800 to get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Let's proceed to step 14:
506 can be fit into 2820 5 times, resulting in a remainder of 290.
Put 5 as the next digit of the answer. 
Result so far: 154980.247035
Subtracting 2530 from 2820 leaves us with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Step 15:
506 goes into 2900 5 times with a remainder of 370.
Write down 5 as next digit of the result. 
Result so far: 154980.2470355
If we take 2530 away from 2900, we end up with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

The quotient of the division is 154980.2470355, and the remainder is 3.7e-06.