66386 ÷ 1 = 66386 R0
We're going to perform division on 66386 with 1 as the divisor.

Step 1:
1 goes into 6 6 times with a remainder of 0.
Write down 6 as next digit of of the result. 
Result so far: 6
Subtract 6 from 6 to get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

Step 2:
1 goes into 6 6 times with a remainder of 0.
Write down 6 as next digit of of the result. 
Result so far: 66
Subtract 6 from 6 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 1

Step 3:
1 goes into 3 3 times with a remainder of 0.
Write down 3 as next digit of of the result. 
Result so far: 663
Subtract 3 from 3 to get 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 1

Step 4:
1 goes into 8 8 times with a remainder of 0.
Write down 8 as next digit of of the result. 
Result so far: 6638
Subtract 8 from 8 to get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

Step 5:
1 goes into 6 6 times with a remainder of 0.
Write down 6 as next digit of of the result. 
Result so far: 66386
Subtract 6 from 6 to get 0.

The final result is 66386 with a remainder of 0.