In the given reaction sequence, the amount of R produced (in g) is ____.
\(\text { Benzene } \xrightarrow[80 \%]{\substack{\text { oleum (excess), } \\ 200^{\circ} \mathrm{C}}} \mathbf{P} \xrightarrow[75 \%]{\substack{\mathrm{NaOH}, \text { heat } \\ \text { then } \mathrm{H}_3 \mathrm{O}^{+}}} \mathbf{Q} \xrightarrow[50 \%]{\mathrm{HNO}_3 \text { (excess) } / \mathrm{H}_2 \mathrm{SO}_4 \text { (excess) }} \mathbf{R}\)
(Given: molar mass (in g mol-1) of H = 1, C = 12, N = 14, O = 16, and S = 32) (rounded off to two decimal places)
Enter numerical value using the virtual keypad. Round off where necessary.