Step 1 :Convert wall length to cm: \(3.6\mathrm{~m} \times 100 \mathrm{~cm/m} = 360 \mathrm{~cm}\)
Step 2 :Calculate the number of tiles: \(\frac{360 \mathrm{~cm}}{40 \mathrm{~cm/tile}}\)
Step 3 :Find the result: \(\frac{360}{40} = 9 \times 10 = 90\)