**Mnemonic Device:**

- 2(Little Willy) + 2(Lost His) + 2(White Hat)

**Explanation:** the formula to calculate the surface area of a rectangle

- 2LW+2LH+2WH

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**Mnemonic Device:**

- 2(Little Willy) + 2(Lost His) + 2(White Hat)

**Explanation:** the formula to calculate the surface area of a rectangle

- 2LW+2LH+2WH

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