71532291 ÷ 78 
We want to figure out the number of times 71532291 can be divided by 78.

Going ahead to step 1:
If we divide 7 by 78, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 78

Let's proceed to step 2:
If we divide 71 by 78, we get 0 and a remainder of 71.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 71, we end up with 71.
Bring next digit (5) of the dividend behind the 71 and repeat the process: 715 / 78

Going ahead to step 3:
78 goes into 715 9 times with a remainder of 13.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 702 from 715 and we're left with 13.
Fetch the next digit (3) from the dividend, attach it to 13 and continue: 133 / 78

Let's proceed to step 4:
133 divided by 78 is 1 with a remainder of 55.
The next digit of our result is 1. 
Result so far: 91.0
Subtract 78 from 133 to get 55.
Fetch the next digit (2) from the dividend, attach it to 55 and continue: 552 / 78

Let's proceed to step 5:
When dividing 552 by 78, we get 7 with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 917.0
Deduct 546 from 552 and we're left with 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 78

Let's proceed to step 6:
If we divide 62 by 78, we get 0 and a remainder of 62.
The number 0 becomes the next digit in our result. 
Result so far: 9170.0
Subtract 0 from 62 to get 62.
Bring next digit (9) of the dividend behind the 62 and repeat the process: 629 / 78

Step 7:
The number 78 fits into 629 8 times, leaving a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 91708.0
Subtract 624 from 629 to get 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 78

Step 8:
If we divide 51 by 78, we get 0 and a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 917080.0
The remainder is 51 after subtracting 0 from 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 9:
If we divide 510 by 78, we get 6 and a remainder of 42.
The next digit of our result is 6. 
Result so far: 917080.6
Subtracting 468 from 510 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 10:
78 goes into 420 5 times with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 917080.65
If we subtract 390 from 420, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
If we divide 300 by 78, we get 3 and a remainder of 66.
Record the quotient 3 as the next digit in the result. 
Result so far: 917080.653
The remainder is 66 after subtracting 234 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 12:
When dividing 660 by 78, we get 8 with a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 917080.6538
Subtracting 624 from 660 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 13:
78 goes into 360 4 times with a remainder of 48.
Use 4 as the next digit of our solution. 
Result so far: 917080.65384
Subtract 312 from 360 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 14:
If we divide 480 by 78, we get 6 and a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 917080.653846
If we subtract 468 from 480, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 15:
The number 78 fits into 120 1 times, leaving a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 917080.6538461
If we subtract 78 from 120, we 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.

Let's proceed to step 16:
420 divided by 78 is 5 with a remainder of 30.
The next digit of our result is 5. 
Result so far: 917080.65384615
The remainder is 30 after subtracting 390 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 917080.65384615, with a leftover of 3e-08.