9128689 ÷ 424 
Our goal is to divide 9128689 by 424.

Step 1:
The number 424 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 424

Going ahead to step 2:
424 goes into 91 0 times with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Fetch the next digit (2) from the dividend, attach it to 91 and continue: 912 / 424

On to step 3:
If we divide 912 by 424, we get 2 and a remainder of 64.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 848 from 912, we get 64.
Fetch the next digit (8) from the dividend, attach it to 64 and continue: 648 / 424

Advancing to step 4:
424 can be fit into 648 1 times, resulting in a remainder of 224.
Put 1 as the next digit of the answer. 
Result so far: 21.0
The remainder is 224 after subtracting 424 from 648.
Append the next digit (6) from the dividend to 224 and continue with: 2246 / 424

Let's proceed to step 5:
When dividing 2246 by 424, we get 5 with a remainder of 126.
The number 5 becomes the next digit in our result. 
Result so far: 215.0
If we take 2120 away from 2246, we end up with 126.
Bring next digit (8) of the dividend behind the 126 and repeat the process: 1268 / 424

On to step 6:
424 goes into 1268 2 times with a remainder of 420.
The number 2 becomes the next digit in our result. 
Result so far: 2152.0
Subtracting 848 from 1268 leaves us with 420.
Include the next digit (9) from the dividend after 420, then repeat: 4209 / 424

Advancing to step 7:
424 can be fit into 4209 9 times, resulting in a remainder of 393.
Write down 9 as next digit of the result. 
Result so far: 21529.0
Deduct 3816 from 4209 and we're left with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Going ahead to step 8:
424 can be fit into 3930 9 times, resulting in a remainder of 114.
The next digit of our result is 9. 
Result so far: 21529.9
Subtract 3816 from 3930 to get 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Advancing to step 9:
When dividing 1140 by 424, we get 2 with a remainder of 292.
Record the quotient 2 as the next digit in the result. 
Result so far: 21529.92
Deduct 848 from 1140 and we're left with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Going ahead to step 10:
424 can be fit into 2920 6 times, resulting in a remainder of 376.
Put 6 as the next digit of the answer. 
Result so far: 21529.926
Subtract 2544 from 2920 to get 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Advancing to step 11:
When dividing 3760 by 424, we get 8 with a remainder of 368.
The next digit of our result is 8. 
Result so far: 21529.9268
If we subtract 3392 from 3760, we get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Let's proceed to step 12:
The number 424 fits into 3680 8 times, leaving a remainder of 288.
The next digit of our result is 8. 
Result so far: 21529.92688
Subtracting 3392 from 3680 leaves us with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

The quotient of the division is 21529.92688, and the remainder is 0.000288.