Since base is common, apply the product of powers property: a^m · aⁿ = a^{m + n}.

s · s² = s^{1 + 2}

= s³                                (Add exponents: 1 + 2 = 3)

Since base is common, apply the quotient of powers property: 

= s⁴                               (Subtract exponents: 7 – 3 = 4)

Quotient of  is  s⁴.