Issa solved $5 \times 5 \times 4$ using the equations below. \begin{array}{rcl} 5 \times 5 \times 4 & = & 5 \times (5 \times 4) \\ & & \\ & = & 5 \times 20 \\ & & \\ & = & 100 \end{array} Use the equations below to solve $5 \times 5 \times 4$ in a different way. \begin{array}{rcl} 5 \times 5 \times 4 & = & (5 \times 5) \times 4 \\ & & \\ & = & 25 \times 4 \\ & & \\ & = & 100 \end{array}