72199290 divided by 521 
We want to figure out the number of times 72199290 can be divided by 521.

Moving on to step 1:
If we divide 7 by 521, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 521

Going ahead to step 2:
When dividing 72 by 521, we get 0 with a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Fetch the next digit (1) from the dividend, attach it to 72 and continue: 721 / 521

On to step 3:
521 can be fit into 721 1 times, resulting in a remainder of 200.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 521 from 721, we get 200.
Bring next digit (9) of the dividend behind the 200 and repeat the process: 2009 / 521

Going ahead to step 4:
521 can be fit into 2009 3 times, resulting in a remainder of 446.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Deduct 1563 from 2009 and we're left with 446.
Grab the next digit (9) from the dividend, add it to 446, then carry on: 4469 / 521

Moving on to step 5:
If we divide 4469 by 521, we get 8 and a remainder of 301.
The number 8 becomes the next digit in our result. 
Result so far: 138.0
If we subtract 4168 from 4469, we get 301.
Take the next digit (2) from the dividend and append it to 301, then repeat: 3012 / 521

On to step 6:
521 can be fit into 3012 5 times, resulting in a remainder of 407.
The number 5 becomes the next digit in our result. 
Result so far: 1385.0
Subtract 2605 from 3012 to get 407.
Grab the next digit (9) from the dividend, add it to 407, then carry on: 4079 / 521

Let's proceed to step 7:
521 goes into 4079 7 times with a remainder of 432.
The number 7 becomes the next digit in our result. 
Result so far: 13857.0
If we subtract 3647 from 4079, we get 432.
Include the next digit (0) from the dividend after 432, then repeat: 4320 / 521

On to step 8:
4320 divided by 521 is 8 with a remainder of 152.
Use 8 as the next digit of our solution. 
Result so far: 138578.0
If we take 4168 away from 4320, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Step 9:
The number 521 fits into 1520 2 times, leaving a remainder of 478.
Write down 2 as next digit of the result. 
Result so far: 138578.2
If we take 1042 away from 1520, we end up with 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Let's proceed to step 10:
4780 divided by 521 is 9 with a remainder of 91.
Put 9 as the next digit of the answer. 
Result so far: 138578.29
If we subtract 4689 from 4780, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 11:
910 divided by 521 is 1 with a remainder of 389.
The number 1 becomes the next digit in our result. 
Result so far: 138578.291
Subtracting 521 from 910 leaves us with 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Moving on to step 12:
521 can be fit into 3890 7 times, resulting in a remainder of 243.
The next digit of our result is 7. 
Result so far: 138578.2917
If we subtract 3647 from 3890, we get 243.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2430, and continue the process.

Moving on to step 13:
2430 divided by 521 is 4 with a remainder of 346.
The number 4 becomes the next digit in our result. 
Result so far: 138578.29174
The remainder is 346 after subtracting 2084 from 2430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Going ahead to step 14:
The number 521 fits into 3460 6 times, leaving a remainder of 334.
Use 6 as the next digit of our solution. 
Result so far: 138578.291746
Subtract 3126 from 3460 to get 334.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

Moving on to step 15:
3340 divided by 521 is 6 with a remainder of 214.
The next digit of our result is 6. 
Result so far: 138578.2917466
If we subtract 3126 from 3340, we get 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

The final result is 138578.2917466 with a remainder of 2.14e-06.