9921288 ÷ 721 
We want to divide 9921288 by 721.

Advancing to step 1:
721 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 721

Step 2:
If we divide 99 by 721, we get 0 and a remainder of 99.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Fetch the next digit (2) from the dividend, attach it to 99 and continue: 992 / 721

Going ahead to step 3:
992 divided by 721 is 1 with a remainder of 271.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 721 from 992 to get 271.
Bring next digit (1) of the dividend behind the 271 and repeat the process: 2711 / 721

On to step 4:
721 can be fit into 2711 3 times, resulting in a remainder of 548.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we subtract 2163 from 2711, we get 548.
Include the next digit (2) from the dividend after 548, then repeat: 5482 / 721

Going ahead to step 5:
5482 divided by 721 is 7 with a remainder of 435.
Write down 7 as next digit of the result. 
Result so far: 137.0
Subtract 5047 from 5482 to get 435.
Append the next digit (8) from the dividend to 435 and continue with: 4358 / 721

Advancing to step 6:
721 can be fit into 4358 6 times, resulting in a remainder of 32.
Put 6 as the next digit of the answer. 
Result so far: 1376.0
Deduct 4326 from 4358 and we're left with 32.
Grab the next digit (8) from the dividend, add it to 32, then carry on: 328 / 721

Advancing to step 7:
721 can be fit into 328 0 times, resulting in a remainder of 328.
The number 0 becomes the next digit in our result. 
Result so far: 13760.0
If we subtract 0 from 328, we get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Let's proceed to step 8:
When dividing 3280 by 721, we get 4 with a remainder of 396.
The next digit of our result is 4. 
Result so far: 13760.4
The remainder is 396 after subtracting 2884 from 3280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Let's proceed to step 9:
721 goes into 3960 5 times with a remainder of 355.
Write down 5 as next digit of the result. 
Result so far: 13760.45
Subtracting 3605 from 3960 leaves us with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

Let's proceed to step 10:
The number 721 fits into 3550 4 times, leaving a remainder of 666.
The next digit of our result is 4. 
Result so far: 13760.454
Subtracting 2884 from 3550 leaves us with 666.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6660, and continue the process.

Let's proceed to step 11:
6660 divided by 721 is 9 with a remainder of 171.
Put 9 as the next digit of the answer. 
Result so far: 13760.4549
If we take 6489 away from 6660, we end up with 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Going ahead to step 12:
If we divide 1710 by 721, we get 2 and a remainder of 268.
Use 2 as the next digit of our solution. 
Result so far: 13760.45492
Deduct 1442 from 1710 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.

Let's proceed to step 13:
The number 721 fits into 2680 3 times, leaving a remainder of 517.
Put 3 as the next digit of the answer. 
Result so far: 13760.454923
The remainder is 517 after subtracting 2163 from 2680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5170, and continue the process.

Going ahead to step 14:
The number 721 fits into 5170 7 times, leaving a remainder of 123.
Use 7 as the next digit of our solution. 
Result so far: 13760.4549237
Deduct 5047 from 5170 and we're left with 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Advancing to step 15:
The number 721 fits into 1230 1 times, leaving a remainder of 509.
Put 1 as the next digit of the answer. 
Result so far: 13760.45492371
Deduct 721 from 1230 and we're left with 509.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

The quotient of the division is 13760.45492371, and the remainder is 5.09e-07.