39846868 ÷ 578 
We want to figure out the number of times 39846868 can be divided by 578.

Step 1:
3 divided by 578 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 578

Moving on to step 2:
39 divided by 578 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Append the next digit (8) from the dividend to 39 and continue with: 398 / 578

Going ahead to step 3:
578 can be fit into 398 0 times, resulting in a remainder of 398.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 398 and we're left with 398.
Include the next digit (4) from the dividend after 398, then repeat: 3984 / 578

Moving on to step 4:
3984 divided by 578 is 6 with a remainder of 516.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 3468 away from 3984, we end up with 516.
Bring next digit (6) of the dividend behind the 516 and repeat the process: 5166 / 578

Moving on to step 5:
The number 578 fits into 5166 8 times, leaving a remainder of 542.
Use 8 as the next digit of our solution. 
Result so far: 68.0
The remainder is 542 after subtracting 4624 from 5166.
Grab the next digit (8) from the dividend, add it to 542, then carry on: 5428 / 578

Step 6:
578 can be fit into 5428 9 times, resulting in a remainder of 226.
Record the quotient 9 as the next digit in the result. 
Result so far: 689.0
The remainder is 226 after subtracting 5202 from 5428.
Take the next digit (6) from the dividend and append it to 226, then repeat: 2266 / 578

Moving on to step 7:
578 goes into 2266 3 times with a remainder of 532.
Put 3 as the next digit of the answer. 
Result so far: 6893.0
If we subtract 1734 from 2266, we get 532.
Include the next digit (8) from the dividend after 532, then repeat: 5328 / 578

Going ahead to step 8:
If we divide 5328 by 578, we get 9 and a remainder of 126.
Write down 9 as next digit of the result. 
Result so far: 68939.0
If we subtract 5202 from 5328, we get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Moving on to step 9:
578 can be fit into 1260 2 times, resulting in a remainder of 104.
Write down 2 as next digit of the result. 
Result so far: 68939.2
Subtract 1156 from 1260 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Advancing to step 10:
578 can be fit into 1040 1 times, resulting in a remainder of 462.
Record the quotient 1 as the next digit in the result. 
Result so far: 68939.21
Subtracting 578 from 1040 leaves us with 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

On to step 11:
If we divide 4620 by 578, we get 7 and a remainder of 574.
Use 7 as the next digit of our solution. 
Result so far: 68939.217
If we take 4046 away from 4620, we end up with 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

Going ahead to step 12:
When dividing 5740 by 578, we get 9 with a remainder of 538.
Record the quotient 9 as the next digit in the result. 
Result so far: 68939.2179
If we take 5202 away from 5740, we end up with 538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

Let's proceed to step 13:
578 can be fit into 5380 9 times, resulting in a remainder of 178.
Put 9 as the next digit of the answer. 
Result so far: 68939.21799
Subtracting 5202 from 5380 leaves us with 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

The final result is 68939.21799 with a remainder of 0.000178.