Let's divide 31521573 by 79
We want to figure out the number of times 31521573 can be divided by 79.

Let's proceed to step 1:
79 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 79

Let's proceed to step 2:
If we divide 31 by 79, we get 0 and a remainder of 31.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Fetch the next digit (5) from the dividend, attach it to 31 and continue: 315 / 79

On to step 3:
If we divide 315 by 79, we get 3 and a remainder of 78.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 237 from 315 leaves us with 78.
Append the next digit (2) from the dividend to 78 and continue with: 782 / 79

Advancing to step 4:
The number 79 fits into 782 9 times, leaving a remainder of 71.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Deduct 711 from 782 and we're left with 71.
Bring next digit (1) of the dividend behind the 71 and repeat the process: 711 / 79

Step 5:
79 goes into 711 9 times with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 399.0
Subtract 711 from 711 to get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 79

Moving on to step 6:
5 divided by 79 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 3990.0
If we subtract 0 from 5, we get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 79

Let's proceed to step 7:
79 goes into 57 0 times with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 39900.0
Deduct 0 from 57 and we're left with 57.
Fetch the next digit (3) from the dividend, attach it to 57 and continue: 573 / 79

Advancing to step 8:
573 divided by 79 is 7 with a remainder of 20.
The next digit of our result is 7. 
Result so far: 399007.0
The remainder is 20 after subtracting 553 from 573.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 9:
200 divided by 79 is 2 with a remainder of 42.
The next digit of our result is 2. 
Result so far: 399007.2
Subtract 158 from 200 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 10:
When dividing 420 by 79, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 399007.25
The remainder is 25 after subtracting 395 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 11:
When dividing 250 by 79, we get 3 with a remainder of 13.
Record the quotient 3 as the next digit in the result. 
Result so far: 399007.253
If we take 237 away from 250, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 12:
79 goes into 130 1 times with a remainder of 51.
Write down 1 as next digit of the result. 
Result so far: 399007.2531
If we take 79 away from 130, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 13:
When dividing 510 by 79, we get 6 with a remainder of 36.
Write down 6 as next digit of the result. 
Result so far: 399007.25316
If we subtract 474 from 510, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 14:
When dividing 360 by 79, we get 4 with a remainder of 44.
The next digit of our result is 4. 
Result so far: 399007.253164
If we take 316 away from 360, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 15:
If we divide 440 by 79, we get 5 and a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 399007.2531645
Deduct 395 from 440 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 16:
When dividing 450 by 79, we get 5 with a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 399007.25316455
Deduct 395 from 450 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.

The quotient of the division is 399007.25316455, and the remainder is 5.5e-08.