72387393 ÷ 578 
We want to divide 72387393 by 578.

Going ahead to step 1:
If we divide 7 by 578, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 578

Moving on to step 2:
If we divide 72 by 578, we get 0 and a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 72 and we're left with 72.
Fetch the next digit (3) from the dividend, attach it to 72 and continue: 723 / 578

Step 3:
When dividing 723 by 578, we get 1 with a remainder of 145.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 145 after subtracting 578 from 723.
Grab the next digit (8) from the dividend, add it to 145, then carry on: 1458 / 578

Step 4:
578 can be fit into 1458 2 times, resulting in a remainder of 302.
Use 2 as the next digit of our solution. 
Result so far: 12.0
The remainder is 302 after subtracting 1156 from 1458.
Grab the next digit (7) from the dividend, add it to 302, then carry on: 3027 / 578

On to step 5:
When dividing 3027 by 578, we get 5 with a remainder of 137.
Use 5 as the next digit of our solution. 
Result so far: 125.0
If we subtract 2890 from 3027, we get 137.
Append the next digit (3) from the dividend to 137 and continue with: 1373 / 578

On to step 6:
578 can be fit into 1373 2 times, resulting in a remainder of 217.
The number 2 becomes the next digit in our result. 
Result so far: 1252.0
Deduct 1156 from 1373 and we're left with 217.
Bring next digit (9) of the dividend behind the 217 and repeat the process: 2179 / 578

Going ahead to step 7:
2179 divided by 578 is 3 with a remainder of 445.
Write down 3 as next digit of the result. 
Result so far: 12523.0
If we subtract 1734 from 2179, we get 445.
Grab the next digit (3) from the dividend, add it to 445, then carry on: 4453 / 578

On to step 8:
578 goes into 4453 7 times with a remainder of 407.
Write down 7 as next digit of the result. 
Result so far: 125237.0
If we take 4046 away from 4453, we end up with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Going ahead to step 9:
578 goes into 4070 7 times with a remainder of 24.
Put 7 as the next digit of the answer. 
Result so far: 125237.7
Subtracting 4046 from 4070 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
240 divided by 578 is 0 with a remainder of 240.
Write down 0 as next digit of the result. 
Result so far: 125237.7
If we subtract 0 from 240, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 11:
The number 578 fits into 2400 4 times, leaving a remainder of 88.
Write down 4 as next digit of the result. 
Result so far: 125237.704
If we take 2312 away from 2400, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 12:
The number 578 fits into 880 1 times, leaving a remainder of 302.
Record the quotient 1 as the next digit in the result. 
Result so far: 125237.7041
Deduct 578 from 880 and we're left with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

On to step 13:
3020 divided by 578 is 5 with a remainder of 130.
The number 5 becomes the next digit in our result. 
Result so far: 125237.70415
If we subtract 2890 from 3020, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 14:
1300 divided by 578 is 2 with a remainder of 144.
Write down 2 as next digit of the result. 
Result so far: 125237.704152
Subtract 1156 from 1300 to get 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 15:
578 can be fit into 1440 2 times, resulting in a remainder of 284.
Write down 2 as next digit of the result. 
Result so far: 125237.7041522
Subtract 1156 from 1440 to get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

After the division, we end up with 125237.7041522 and a remainder of 2.84e-06.