We're dividing 72999355 by 961 
We want to figure out the number of times 72999355 can be divided by 961.

On to step 1:
7 divided by 961 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 961

On to step 2:
961 goes into 72 0 times with a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Include the next digit (9) from the dividend after 72, then repeat: 729 / 961

Step 3:
The number 961 fits into 729 0 times, leaving a remainder of 729.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 729 leaves us with 729.
Include the next digit (9) from the dividend after 729, then repeat: 7299 / 961

On to step 4:
When dividing 7299 by 961, we get 7 with a remainder of 572.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 6727 from 7299 leaves us with 572.
Take the next digit (9) from the dividend and append it to 572, then repeat: 5729 / 961

Let's proceed to step 5:
961 can be fit into 5729 5 times, resulting in a remainder of 924.
The next digit of our result is 5. 
Result so far: 75.0
Subtracting 4805 from 5729 leaves us with 924.
Append the next digit (3) from the dividend to 924 and continue with: 9243 / 961

Moving on to step 6:
9243 divided by 961 is 9 with a remainder of 594.
Put 9 as the next digit of the answer. 
Result so far: 759.0
Deduct 8649 from 9243 and we're left with 594.
Include the next digit (5) from the dividend after 594, then repeat: 5945 / 961

Going ahead to step 7:
961 goes into 5945 6 times with a remainder of 179.
Put 6 as the next digit of the answer. 
Result so far: 7596.0
Deduct 5766 from 5945 and we're left with 179.
Grab the next digit (5) from the dividend, add it to 179, then carry on: 1795 / 961

Step 8:
961 goes into 1795 1 times with a remainder of 834.
Put 1 as the next digit of the answer. 
Result so far: 75961.0
Deduct 961 from 1795 and we're left with 834.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8340, and continue the process.

Let's proceed to step 9:
When dividing 8340 by 961, we get 8 with a remainder of 652.
Put 8 as the next digit of the answer. 
Result so far: 75961.8
The remainder is 652 after subtracting 7688 from 8340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6520, and continue the process.

Advancing to step 10:
If we divide 6520 by 961, we get 6 and a remainder of 754.
Record the quotient 6 as the next digit in the result. 
Result so far: 75961.86
If we subtract 5766 from 6520, we get 754.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7540, and continue the process.

On to step 11:
7540 divided by 961 is 7 with a remainder of 813.
The next digit of our result is 7. 
Result so far: 75961.867
The remainder is 813 after subtracting 6727 from 7540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8130, and continue the process.

Step 12:
8130 divided by 961 is 8 with a remainder of 442.
Put 8 as the next digit of the answer. 
Result so far: 75961.8678
If we subtract 7688 from 8130, we get 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Moving on to step 13:
When dividing 4420 by 961, we get 4 with a remainder of 576.
Put 4 as the next digit of the answer. 
Result so far: 75961.86784
Subtracting 3844 from 4420 leaves us with 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Step 14:
If we divide 5760 by 961, we get 5 and a remainder of 955.
The next digit of our result is 5. 
Result so far: 75961.867845
If we subtract 4805 from 5760, we get 955.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9550, and continue the process.

Step 15:
961 goes into 9550 9 times with a remainder of 901.
Record the quotient 9 as the next digit in the result. 
Result so far: 75961.8678459
Deduct 8649 from 9550 and we're left with 901.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9010, and continue the process.

Advancing to step 16:
When dividing 9010 by 961, we get 9 with a remainder of 361.
The next digit of our result is 9. 
Result so far: 75961.86784599
Subtract 8649 from 9010 to get 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

The final result is 75961.86784599 with a remainder of 3.61e-07.