78494380 divided by 503 
We want to figure out the number of times 78494380 can be divided by 503.

On to step 1:
503 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 503

On to step 2:
503 can be fit into 78 0 times, resulting in a remainder of 78.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Append the next digit (4) from the dividend to 78 and continue with: 784 / 503

Step 3:
When dividing 784 by 503, we get 1 with a remainder of 281.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 503 from 784, we get 281.
Grab the next digit (9) from the dividend, add it to 281, then carry on: 2819 / 503

Let's proceed to step 4:
503 goes into 2819 5 times with a remainder of 304.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 304 after subtracting 2515 from 2819.
Fetch the next digit (4) from the dividend, attach it to 304 and continue: 3044 / 503

Going ahead to step 5:
503 can be fit into 3044 6 times, resulting in a remainder of 26.
The next digit of our result is 6. 
Result so far: 156.0
Deduct 3018 from 3044 and we're left with 26.
Bring next digit (3) of the dividend behind the 26 and repeat the process: 263 / 503

Going ahead to step 6:
The number 503 fits into 263 0 times, leaving a remainder of 263.
Write down 0 as next digit of the result. 
Result so far: 1560.0
If we take 0 away from 263, we end up with 263.
Take the next digit (8) from the dividend and append it to 263, then repeat: 2638 / 503

Going ahead to step 7:
The number 503 fits into 2638 5 times, leaving a remainder of 123.
Write down 5 as next digit of the result. 
Result so far: 15605.0
If we take 2515 away from 2638, we end up with 123.
Append the next digit (0) from the dividend to 123 and continue with: 1230 / 503

Moving on to step 8:
503 goes into 1230 2 times with a remainder of 224.
The number 2 becomes the next digit in our result. 
Result so far: 156052.0
Subtract 1006 from 1230 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Step 9:
2240 divided by 503 is 4 with a remainder of 228.
Put 4 as the next digit of the answer. 
Result so far: 156052.4
Subtract 2012 from 2240 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Advancing to step 10:
The number 503 fits into 2280 4 times, leaving a remainder of 268.
Put 4 as the next digit of the answer. 
Result so far: 156052.44
Deduct 2012 from 2280 and we're left with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

After the division, we end up with 156052.44 and a remainder of 0.268.