Question Number 58780 by hhghg last updated on 29/Apr/19
$$\mathrm{367}×\mathrm{25} \\ $$$$\mathrm{397}×\mathrm{45} \\ $$$$\mathrm{484}×\mathrm{79} \\ $$
Answered by ajfour last updated on 30/Apr/19
$$\mathrm{3}×\mathrm{25}×\mathrm{100}+\mathrm{6}×\mathrm{25}×\mathrm{10}+\mathrm{7}×\mathrm{25} \\ $$$$=\mathrm{7500}+\mathrm{1500}+\mathrm{175}\:=\:\mathrm{9175} \\ $$$$\mathrm{likewise}\:\mathrm{the}\:\mathrm{rest}. \\ $$