99203953 ÷ 507 
We want to figure out the number of times 99203953 can be divided by 507.

On to step 1:
507 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 507

Let's proceed to step 2:
If we divide 99 by 507, we get 0 and a remainder of 99.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Grab the next digit (2) from the dividend, add it to 99, then carry on: 992 / 507

Moving on to step 3:
507 can be fit into 992 1 times, resulting in a remainder of 485.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 507 away from 992, we end up with 485.
Bring next digit (0) of the dividend behind the 485 and repeat the process: 4850 / 507

On to step 4:
If we divide 4850 by 507, we get 9 and a remainder of 287.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we subtract 4563 from 4850, we get 287.
Append the next digit (3) from the dividend to 287 and continue with: 2873 / 507

Moving on to step 5:
507 goes into 2873 5 times with a remainder of 338.
Record the quotient 5 as the next digit in the result. 
Result so far: 195.0
If we subtract 2535 from 2873, we get 338.
Take the next digit (9) from the dividend and append it to 338, then repeat: 3389 / 507

Going ahead to step 6:
When dividing 3389 by 507, we get 6 with a remainder of 347.
Use 6 as the next digit of our solution. 
Result so far: 1956.0
The remainder is 347 after subtracting 3042 from 3389.
Include the next digit (5) from the dividend after 347, then repeat: 3475 / 507

Advancing to step 7:
507 goes into 3475 6 times with a remainder of 433.
Put 6 as the next digit of the answer. 
Result so far: 19566.0
If we subtract 3042 from 3475, we get 433.
Include the next digit (3) from the dividend after 433, then repeat: 4333 / 507

Let's proceed to step 8:
4333 divided by 507 is 8 with a remainder of 277.
Use 8 as the next digit of our solution. 
Result so far: 195668.0
The remainder is 277 after subtracting 4056 from 4333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Going ahead to step 9:
507 can be fit into 2770 5 times, resulting in a remainder of 235.
Record the quotient 5 as the next digit in the result. 
Result so far: 195668.5
Deduct 2535 from 2770 and we're left with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Step 10:
507 can be fit into 2350 4 times, resulting in a remainder of 322.
Write down 4 as next digit of the result. 
Result so far: 195668.54
If we subtract 2028 from 2350, we get 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

Advancing to step 11:
When dividing 3220 by 507, we get 6 with a remainder of 178.
Write down 6 as next digit of the result. 
Result so far: 195668.546
Subtract 3042 from 3220 to get 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Going ahead to step 12:
The number 507 fits into 1780 3 times, leaving a remainder of 259.
Use 3 as the next digit of our solution. 
Result so far: 195668.5463
Subtracting 1521 from 1780 leaves us with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Step 13:
507 goes into 2590 5 times with a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 195668.54635
Deduct 2535 from 2590 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 14:
550 divided by 507 is 1 with a remainder of 43.
Record the quotient 1 as the next digit in the result. 
Result so far: 195668.546351
Subtracting 507 from 550 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 15:
430 divided by 507 is 0 with a remainder of 430.
The number 0 becomes the next digit in our result. 
Result so far: 195668.546351
Subtracting 0 from 430 leaves us with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Let's proceed to step 16:
507 can be fit into 4300 8 times, resulting in a remainder of 244.
Record the quotient 8 as the next digit in the result. 
Result so far: 195668.54635108
The remainder is 244 after subtracting 4056 from 4300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

The quotient of the division is 195668.54635108, and the remainder is 2.44e-07.