What is the primary function of villi in the small

What will come in the place of question mark (?) in the given expression?

? = (40% of 80% of 6400) ÷ 64

360 × 9 ÷ 3 + 120 + 900 ÷ 5 = ?

120% of 25 + 80 X 2 = ?² - 6

What will come in the place of question mark (?) in the given expression?

48 X 2.5 + 20% of 150 = ? + 166

30% of 750 + ?% of 400 = 25% of 1016 + 3

√1444 + √729 – √2116 = ?

24% of 150% of 500 + 140 = ? × 8 

10 × 100 ÷ 5 + 9 = ?

What will come in the place of question mark (?) in the given expression?

30% of 50% of 1200 = 18/11 × ?