India is clearly the larger of the two: about 3,155,807 km² km² against 9,439,424 km² km², roughly 3× at true size. Drag one onto the other on the map above to feel the gap.
India sits in Asia, United States in North America. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 3×.
The old map muddied it further: Mercator inflates India about 1.2× and United States about 2×, so on a Mercator-style map this pair appears 5× apart instead of the true 3×.
India fits 2× into United States.