Let's divide 66556015 by 390
Let's see how many times 390 fits into 66556015.

Step 1:
The number 390 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 390

On to step 2:
66 divided by 390 is 0 with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Grab the next digit (5) from the dividend, add it to 66, then carry on: 665 / 390

Let's proceed to step 3:
The number 390 fits into 665 1 times, leaving a remainder of 275.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 275 after subtracting 390 from 665.
Append the next digit (5) from the dividend to 275 and continue with: 2755 / 390

Advancing to step 4:
390 goes into 2755 7 times with a remainder of 25.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Subtracting 2730 from 2755 leaves us with 25.
Append the next digit (6) from the dividend to 25 and continue with: 256 / 390

Going ahead to step 5:
The number 390 fits into 256 0 times, leaving a remainder of 256.
The next digit of our result is 0. 
Result so far: 170.0
Subtracting 0 from 256 leaves us with 256.
Fetch the next digit (0) from the dividend, attach it to 256 and continue: 2560 / 390

On to step 6:
The number 390 fits into 2560 6 times, leaving a remainder of 220.
Write down 6 as next digit of the result. 
Result so far: 1706.0
Deduct 2340 from 2560 and we're left with 220.
Append the next digit (1) from the dividend to 220 and continue with: 2201 / 390

Step 7:
390 can be fit into 2201 5 times, resulting in a remainder of 251.
The number 5 becomes the next digit in our result. 
Result so far: 17065.0
Subtracting 1950 from 2201 leaves us with 251.
Grab the next digit (5) from the dividend, add it to 251, then carry on: 2515 / 390

Let's proceed to step 8:
390 can be fit into 2515 6 times, resulting in a remainder of 175.
The number 6 becomes the next digit in our result. 
Result so far: 170656.0
Deduct 2340 from 2515 and we're left with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Going ahead to step 9:
390 can be fit into 1750 4 times, resulting in a remainder of 190.
Use 4 as the next digit of our solution. 
Result so far: 170656.4
Subtracting 1560 from 1750 leaves us with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Advancing to step 10:
390 goes into 1900 4 times with a remainder of 340.
Write down 4 as next digit of the result. 
Result so far: 170656.44
Deduct 1560 from 1900 and we're left with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

The final outcome is 170656.44, with a leftover of 0.34.