Square hectare

\[\begin{aligned} y[cm²] &= 1 \times 10^{8}x[hectare] \\ y[km²] &= 0.01x \\ y[m²] &= 10000x \\ y[mile²] &= 0.00386102x \\ y[yard²] &= 11959.9x \\ y[foot²] &= 107639x \\ y[inch²] &= 1.55 \times 10^{7}x \\ y[acre] &= 2.47105x \end{aligned}\]