We look at the division of 83403580 by 523 
We want to figure out the number of times 83403580 can be divided by 523.

Moving on to step 1:
The number 523 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 523

Advancing to step 2:
523 can be fit into 83 0 times, resulting in a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 83 and we're left with 83.
Append the next digit (4) from the dividend to 83 and continue with: 834 / 523

Advancing to step 3:
The number 523 fits into 834 1 times, leaving a remainder of 311.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 523 away from 834, we end up with 311.
Take the next digit (0) from the dividend and append it to 311, then repeat: 3110 / 523

Advancing to step 4:
If we divide 3110 by 523, we get 5 and a remainder of 495.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtract 2615 from 3110 to get 495.
Grab the next digit (3) from the dividend, add it to 495, then carry on: 4953 / 523

Advancing to step 5:
523 can be fit into 4953 9 times, resulting in a remainder of 246.
The next digit of our result is 9. 
Result so far: 159.0
The remainder is 246 after subtracting 4707 from 4953.
Fetch the next digit (5) from the dividend, attach it to 246 and continue: 2465 / 523

Advancing to step 6:
2465 divided by 523 is 4 with a remainder of 373.
The next digit of our result is 4. 
Result so far: 1594.0
If we take 2092 away from 2465, we end up with 373.
Grab the next digit (8) from the dividend, add it to 373, then carry on: 3738 / 523

Advancing to step 7:
523 can be fit into 3738 7 times, resulting in a remainder of 77.
Record the quotient 7 as the next digit in the result. 
Result so far: 15947.0
The remainder is 77 after subtracting 3661 from 3738.
Bring next digit (0) of the dividend behind the 77 and repeat the process: 770 / 523

Step 8:
When dividing 770 by 523, we get 1 with a remainder of 247.
Write down 1 as next digit of the result. 
Result so far: 159471.0
Subtract 523 from 770 to get 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Step 9:
If we divide 2470 by 523, we get 4 and a remainder of 378.
Record the quotient 4 as the next digit in the result. 
Result so far: 159471.4
The remainder is 378 after subtracting 2092 from 2470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Step 10:
The number 523 fits into 3780 7 times, leaving a remainder of 119.
The next digit of our result is 7. 
Result so far: 159471.47
Subtracting 3661 from 3780 leaves us with 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Step 11:
The number 523 fits into 1190 2 times, leaving a remainder of 144.
The next digit of our result is 2. 
Result so far: 159471.472
Deduct 1046 from 1190 and we're left with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Going ahead to step 12:
1440 divided by 523 is 2 with a remainder of 394.
Put 2 as the next digit of the answer. 
Result so far: 159471.4722
The remainder is 394 after subtracting 1046 from 1440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

The quotient of the division is 159471.4722, and the remainder is 0.00394.