1 x 10^(-9)

Assoc Prof ahxings was giving Physics lesson to his class...

Assoc Prof ahxings: "Ok do you all know "milli" is equivalent to how many?"
Students: "1 x 10 to the power of -3!"
Assoc Prof ahxings: "Correct! How about "micro"?"
Students: "1 x 10 to the power of -6!"
Assoc Prof ahxings: "Outstanding! Now what about "nano" then?"
Students: "1 x 10 to the power of -9!"
Assoc Prof ahxings: "WRONG! It should be.... nano nano nano nano nano nano nano, nano nano nano, sweet sour and salty~ nano nano~~ nano nanooo~ nano, nanoooOOOO~~~"
(ziiippp, ziiiipppp, krack, bruang, yeeeeeeee......... booom!)

All the students left the class.......