Jane’s garden is 3.4 m x 6.5 m if fencing costs 2.25 per meter how much will it cost to enclose Jane’s garden

The perimeter of Jane's garden is (3.4 + 6.5) * 2 = <<(3.4+6.5)*2=20.8>>20.8 meters.

Therefore, it will cost 20.8 * 2.25 = $<<20.8*2.25=46.8>>46.8 to enclose Jane's garden. Answer: \boxed{46.8}.