The choir director set up chairs for the concert with an equal number of rows and columns. The number of chairs in each row and column is represented by the algebraic expression , where is the total number of chairs.

What is the number of chairs in each row and column if = 81 chairs?

(A) |
3 chairs |

(B) |
9 chairs |

(C) |
40.5 chairs |

(D) |
162 chairs |

C