In a certain library the first shelf is $10\mathrm{.}0$ cm off the ground, and the remaining four shelves are each spaced $28\mathrm{.}0$ cm above the previous one.

Part A

If the average book has a mass of $1\mathrm{.}40$ kg with a height of $23\mathrm{.}0$ cm $,$ and an average shelf holds $29$ books $($standing vertically$),$ how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start?

Express your answer to three significant figures and include the appropriate units.

$W=$

$$

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