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const boxes = [[2, 3, 4], [1, 1, 10]];

function total_surface_area(boxes) {
  let total_surface = 0;
  
  for (let box of boxes) {
    const sides = [box[0]*box[1], box[1]*box[2], box[2]*box[0]];
    const smallest_side = Math.min(...sides);
    const box_surface = (sides[0] + sides[1] + sides[2])*2 + smallest_side;
    total_surface = total_surface + box_surface;
  }
  
  return total_surface;
}

console.log(total_surface_area(boxes));