Find the HCF of 84 and 448 using Euclid’s division lemma.

Euclid's division lemma: Dividend = Divisor $\times$ Quotient + Remainder.

448 = 84 $\times$ 5 + 28

84 = 28 $\times$ 3 + 0

Here, the remainder becomes zero. Therefore, the HCF of 84 and 448 is 28.