On Tuesday at 2 p.m., the ocean’s surface at the beach was at an elevation of 2.2 feet. Winston’s house is at an elevation of 12.1 feet. The elevation of his friend Tammy’s house is 3 1/2 times the elevation of Winston’s house.

How many times greater is the elevation of Tammy’s house than the elevation of the ocean’s surface at 2 p.m.?