66388 ÷ 5 = 13277 R3
Let's divide 66388 by 5.

Step 1:
5 goes into 6 1 times with a remainder of 1.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 5 from 6 to get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 5

Step 2:
5 goes into 16 3 times with a remainder of 1.
Write down 3 as next digit of of the result. 
Result so far: 13
Subtract 15 from 16 to get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 5

Step 3:
5 goes into 13 2 times with a remainder of 3.
Write down 2 as next digit of of the result. 
Result so far: 132
Subtract 10 from 13 to get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 5

Step 4:
5 goes into 38 7 times with a remainder of 3.
Write down 7 as next digit of of the result. 
Result so far: 1327
Subtract 35 from 38 to get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 5

Step 5:
5 goes into 38 7 times with a remainder of 3.
Write down 7 as next digit of of the result. 
Result so far: 13277
Subtract 35 from 38 to get 3.

The final result is 13277 with a remainder of 3.