Hey there!
3 5/8 * 21 2/3
= 3 * 8 + 5 / 8 * 21 * 3 + 2 / 3
= 24 + 5 / 8 * 63 + 2 / 3
= 29 / 8 * 65 / 2
= 29 * 65 / 8 * 2
= 1,885 / 16
= 78 13/24
Therefore, your answer should be:
78 13/24
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)