13860221 ÷ 784 
We want to divide 13860221 by 784.

Advancing to step 1:
If we divide 1 by 784, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 784

Going ahead to step 2:
When dividing 13 by 784, we get 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Bring next digit (8) of the dividend behind the 13 and repeat the process: 138 / 784

Moving on to step 3:
If we divide 138 by 784, we get 0 and a remainder of 138.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 138, we get 138.
Take the next digit (6) from the dividend and append it to 138, then repeat: 1386 / 784

Moving on to step 4:
784 can be fit into 1386 1 times, resulting in a remainder of 602.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 784 from 1386, we get 602.
Fetch the next digit (0) from the dividend, attach it to 602 and continue: 6020 / 784

Let's proceed to step 5:
6020 divided by 784 is 7 with a remainder of 532.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we subtract 5488 from 6020, we get 532.
Append the next digit (2) from the dividend to 532 and continue with: 5322 / 784

Moving on to step 6:
When dividing 5322 by 784, we get 6 with a remainder of 618.
The number 6 becomes the next digit in our result. 
Result so far: 176.0
The remainder is 618 after subtracting 4704 from 5322.
Bring next digit (2) of the dividend behind the 618 and repeat the process: 6182 / 784

Moving on to step 7:
The number 784 fits into 6182 7 times, leaving a remainder of 694.
Record the quotient 7 as the next digit in the result. 
Result so far: 1767.0
The remainder is 694 after subtracting 5488 from 6182.
Include the next digit (1) from the dividend after 694, then repeat: 6941 / 784

Going ahead to step 8:
784 can be fit into 6941 8 times, resulting in a remainder of 669.
The next digit of our result is 8. 
Result so far: 17678.0
If we subtract 6272 from 6941, we get 669.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6690, and continue the process.

On to step 9:
6690 divided by 784 is 8 with a remainder of 418.
The next digit of our result is 8. 
Result so far: 17678.8
Deduct 6272 from 6690 and we're left with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Let's proceed to step 10:
The number 784 fits into 4180 5 times, leaving a remainder of 260.
Put 5 as the next digit of the answer. 
Result so far: 17678.85
Subtract 3920 from 4180 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Step 11:
When dividing 2600 by 784, we get 3 with a remainder of 248.
The number 3 becomes the next digit in our result. 
Result so far: 17678.853
The remainder is 248 after subtracting 2352 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Advancing to step 12:
When dividing 2480 by 784, we get 3 with a remainder of 128.
The number 3 becomes the next digit in our result. 
Result so far: 17678.8533
Deduct 2352 from 2480 and we're left with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The quotient of the division is 17678.8533, and the remainder is 0.00128.