Let's divide 78278574 by 172
Let's see how many times 172 fits into 78278574.

Let's proceed to step 1:
The number 172 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 172

Moving on to step 2:
If we divide 78 by 172, we get 0 and a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Take the next digit (2) from the dividend and append it to 78, then repeat: 782 / 172

Advancing to step 3:
172 can be fit into 782 4 times, resulting in a remainder of 94.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 688 from 782 and we're left with 94.
Fetch the next digit (7) from the dividend, attach it to 94 and continue: 947 / 172

Advancing to step 4:
172 can be fit into 947 5 times, resulting in a remainder of 87.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
The remainder is 87 after subtracting 860 from 947.
Fetch the next digit (8) from the dividend, attach it to 87 and continue: 878 / 172

Advancing to step 5:
The number 172 fits into 878 5 times, leaving a remainder of 18.
The number 5 becomes the next digit in our result. 
Result so far: 455.0
Subtract 860 from 878 to get 18.
Append the next digit (5) from the dividend to 18 and continue with: 185 / 172

Step 6:
If we divide 185 by 172, we get 1 and a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 4551.0
If we take 172 away from 185, we end up with 13.
Take the next digit (7) from the dividend and append it to 13, then repeat: 137 / 172

Step 7:
If we divide 137 by 172, we get 0 and a remainder of 137.
The number 0 becomes the next digit in our result. 
Result so far: 45510.0
Subtract 0 from 137 to get 137.
Include the next digit (4) from the dividend after 137, then repeat: 1374 / 172

Advancing to step 8:
172 can be fit into 1374 7 times, resulting in a remainder of 170.
Record the quotient 7 as the next digit in the result. 
Result so far: 455107.0
If we take 1204 away from 1374, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 9:
1700 divided by 172 is 9 with a remainder of 152.
The next digit of our result is 9. 
Result so far: 455107.9
The remainder is 152 after subtracting 1548 from 1700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Step 10:
The number 172 fits into 1520 8 times, leaving a remainder of 144.
The next digit of our result is 8. 
Result so far: 455107.98
The remainder is 144 after subtracting 1376 from 1520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Step 11:
If we divide 1440 by 172, we get 8 and a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 455107.988
Subtract 1376 from 1440 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 455107.988, with a leftover of 0.0064.