65386398 ÷ 166 
We're looking to find how many times 166 goes into 65386398.

Advancing to step 1:
166 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 166

Going ahead to step 2:
65 divided by 166 is 0 with a remainder of 65.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 65, we end up with 65.
Fetch the next digit (3) from the dividend, attach it to 65 and continue: 653 / 166

Going ahead to step 3:
166 can be fit into 653 3 times, resulting in a remainder of 155.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 155 after subtracting 498 from 653.
Fetch the next digit (8) from the dividend, attach it to 155 and continue: 1558 / 166

Moving on to step 4:
When dividing 1558 by 166, we get 9 with a remainder of 64.
Write down 9 as next digit of the result. 
Result so far: 39.0
The remainder is 64 after subtracting 1494 from 1558.
Append the next digit (6) from the dividend to 64 and continue with: 646 / 166

On to step 5:
If we divide 646 by 166, we get 3 and a remainder of 148.
Use 3 as the next digit of our solution. 
Result so far: 393.0
Subtracting 498 from 646 leaves us with 148.
Append the next digit (3) from the dividend to 148 and continue with: 1483 / 166

On to step 6:
166 goes into 1483 8 times with a remainder of 155.
Use 8 as the next digit of our solution. 
Result so far: 3938.0
Subtract 1328 from 1483 to get 155.
Take the next digit (9) from the dividend and append it to 155, then repeat: 1559 / 166

Step 7:
166 can be fit into 1559 9 times, resulting in a remainder of 65.
Record the quotient 9 as the next digit in the result. 
Result so far: 39389.0
Subtract 1494 from 1559 to get 65.
Take the next digit (8) from the dividend and append it to 65, then repeat: 658 / 166

Moving on to step 8:
The number 166 fits into 658 3 times, leaving a remainder of 160.
Use 3 as the next digit of our solution. 
Result so far: 393893.0
If we take 498 away from 658, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 9:
If we divide 1600 by 166, we get 9 and a remainder of 106.
The next digit of our result is 9. 
Result so far: 393893.9
Deduct 1494 from 1600 and we're left with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

On to step 10:
1060 divided by 166 is 6 with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 393893.96
Subtract 996 from 1060 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.

Step 11:
When dividing 640 by 166, we get 3 with a remainder of 142.
Use 3 as the next digit of our solution. 
Result so far: 393893.963
Subtracting 498 from 640 leaves us with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Let's proceed to step 12:
The number 166 fits into 1420 8 times, leaving a remainder of 92.
Write down 8 as next digit of the result. 
Result so far: 393893.9638
Subtract 1328 from 1420 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 13:
The number 166 fits into 920 5 times, leaving a remainder of 90.
The number 5 becomes the next digit in our result. 
Result so far: 393893.96385
If we subtract 830 from 920, we get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 14:
The number 166 fits into 900 5 times, leaving a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 393893.963855
If we subtract 830 from 900, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final result is 393893.963855 with a remainder of 7e-06.