It takes 3500 calories to make a pound of fat!

Beef, round, full cut, separable lean and fat, trimmed to 1/8" fat, select, raw
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Energy Fat
33.2 size D batteries 0.5 butter sticks

A serving of 453.6g contains 835kcal, representing ± 33.2 batteries*.

A aged requires 2700kcal (107.3 batteries*) a day.

* size D, 1.5V, 19500mAh

A serving of 453.6g contains 48.44g fat, which is comparable to ± 0.5 butter sticks.