We're dividing 53097164 by 721 
We want to figure out the number of times 53097164 can be divided by 721.

Going ahead to step 1:
The number 721 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 721

Going ahead to step 2:
When dividing 53 by 721, we get 0 with a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Include the next digit (0) from the dividend after 53, then repeat: 530 / 721

On to step 3:
If we divide 530 by 721, we get 0 and a remainder of 530.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 530 to get 530.
Append the next digit (9) from the dividend to 530 and continue with: 5309 / 721

Going ahead to step 4:
5309 divided by 721 is 7 with a remainder of 262.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 262 after subtracting 5047 from 5309.
Take the next digit (7) from the dividend and append it to 262, then repeat: 2627 / 721

Advancing to step 5:
The number 721 fits into 2627 3 times, leaving a remainder of 464.
Use 3 as the next digit of our solution. 
Result so far: 73.0
Subtracting 2163 from 2627 leaves us with 464.
Bring next digit (1) of the dividend behind the 464 and repeat the process: 4641 / 721

Moving on to step 6:
721 goes into 4641 6 times with a remainder of 315.
Put 6 as the next digit of the answer. 
Result so far: 736.0
Subtracting 4326 from 4641 leaves us with 315.
Append the next digit (6) from the dividend to 315 and continue with: 3156 / 721

Step 7:
721 can be fit into 3156 4 times, resulting in a remainder of 272.
Record the quotient 4 as the next digit in the result. 
Result so far: 7364.0
If we take 2884 away from 3156, we end up with 272.
Append the next digit (4) from the dividend to 272 and continue with: 2724 / 721

Let's proceed to step 8:
2724 divided by 721 is 3 with a remainder of 561.
Use 3 as the next digit of our solution. 
Result so far: 73643.0
Subtract 2163 from 2724 to get 561.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5610, and continue the process.

Going ahead to step 9:
721 can be fit into 5610 7 times, resulting in a remainder of 563.
Write down 7 as next digit of the result. 
Result so far: 73643.7
The remainder is 563 after subtracting 5047 from 5610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5630, and continue the process.

Advancing to step 10:
5630 divided by 721 is 7 with a remainder of 583.
Write down 7 as next digit of the result. 
Result so far: 73643.77
Subtracting 5047 from 5630 leaves us with 583.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5830, and continue the process.

The final outcome is 73643.77, with a leftover of 0.583.