text: #pragma once
  
  #include "headers/prf_elements/prf_with_recursion.hpp"
  #include "headers/prfs/sum.hpp"
  
  class Multiplication : public PRFWithRecursion<2>  {
     protected:
      std::array<unsigned, 1> recursion_base_case(
          const std::array<unsigned, 1>& array
      ) const override;
      std::array<unsigned, 1> recursion(
          const std::array<unsigned, 3>& array
      ) const override;
  };