[yummyfajitas]

...what a bodybuilder eats when he's bulking up. But bodybuilders eat 4 times this amount of protein (55 g).

A midget bodybuilder. The rule of thumb is 0.75-1g protein/lb bodyweight, 0.5g for maintenance.

[Hytosys]

55g is the amount of protein referenced in the article. OP is suggesting bodybuilders eat 4 * 55 = 220g of protein a day.