We look at the division of 63903489 by 784 
We want to figure out the number of times 63903489 can be divided by 784.

Step 1:
784 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 784

Let's proceed to step 2:
63 divided by 784 is 0 with a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 784

Step 3:
The number 784 fits into 639 0 times, leaving a remainder of 639.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 639 to get 639.
Bring next digit (0) of the dividend behind the 639 and repeat the process: 6390 / 784

On to step 4:
If we divide 6390 by 784, we get 8 and a remainder of 118.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 6272 from 6390 leaves us with 118.
Append the next digit (3) from the dividend to 118 and continue with: 1183 / 784

On to step 5:
1183 divided by 784 is 1 with a remainder of 399.
The number 1 becomes the next digit in our result. 
Result so far: 81.0
The remainder is 399 after subtracting 784 from 1183.
Include the next digit (4) from the dividend after 399, then repeat: 3994 / 784

Let's proceed to step 6:
When dividing 3994 by 784, we get 5 with a remainder of 74.
Put 5 as the next digit of the answer. 
Result so far: 815.0
The remainder is 74 after subtracting 3920 from 3994.
Fetch the next digit (8) from the dividend, attach it to 74 and continue: 748 / 784

Advancing to step 7:
784 goes into 748 0 times with a remainder of 748.
Use 0 as the next digit of our solution. 
Result so far: 8150.0
If we take 0 away from 748, we end up with 748.
Append the next digit (9) from the dividend to 748 and continue with: 7489 / 784

Moving on to step 8:
784 can be fit into 7489 9 times, resulting in a remainder of 433.
Use 9 as the next digit of our solution. 
Result so far: 81509.0
Subtract 7056 from 7489 to get 433.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4330, and continue the process.

Step 9:
784 goes into 4330 5 times with a remainder of 410.
Put 5 as the next digit of the answer. 
Result so far: 81509.5
If we subtract 3920 from 4330, we get 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Step 10:
4100 divided by 784 is 5 with a remainder of 180.
The number 5 becomes the next digit in our result. 
Result so far: 81509.55
If we subtract 3920 from 4100, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

The final outcome is 81509.55, with a leftover of 0.18.