The number of people in cars is 3 × 4 = <<3*4=12>>12.
The number of people in taxis is 6 × 6 = <<6*6=36>>36.
The number of people in vans is 2 × 5 = <<2*5=10>>10.
In total 12 + 36 + 10 = <<12+36+10=58>>58 people went on the hike.
#### 58