To convert the height of Ali's farmhouse from meters to centimeters, you can multiply the height in meters by the conversion factor of 100 centimeters per meter:
\[ 2.307 \times 10^8 \text{ meters} \times 100 \text{ centimeters/meter} = 2.307 \times 10^8 \times 10^2 \text{ centimeters} \]
By adding the exponents (since \(10^8 \times 10^2 = 10^{8+2} = 10^{10}\)), you get:
\[ 2.307 \times 10^{10} \text{ centimeters} \]
Thus, the height of Ali's farmhouse in centimeters, expressed in scientific notation, is:
\[ \boxed{2.307 \times 10^{10}} \text{ centimeters} \]