6•6:4

To simplify the expression \(6 \cdot 6 \div 4\), first, calculate \(6 \cdot 6\):

\[ 6 \cdot 6 = 36 \]

Now, divide \(36\) by \(4\):

\[ 36 \div 4 = 9 \]

So, \(6 \cdot 6 \div 4 = 9\).