What is the unit digit of 3^58? Options:
A) 0
B) 5
C) 7
D) 1
E) 9
Unit digit in 3^58 = unit digit in [(3^4)^14]*3^2 = 1*9= 
<gadget id="calculator">1*9</gadget>
<output>9</output>
9   Answer is 9
<result>E</result>
What is the unit digit of 3^58?