如何让2,8,3,1,得到24

1: 2 × (8 + 3 + 1)
2: 2 × ((8 + 3) + 1)
3: 2 × (8 + (3 + 1))
4: 2 × (8 + 1 + 3)
5: 2 × ((8 + 1) + 3)
6: 2 × (8 + (1 + 3))
7: 2 × (3 + 8 + 1)
8: 2 × ((3 + 8) + 1)
9: 2 × (3 + (8 + 1))
10: 2 × (3 + 1 + 8)
11: 2 × ((3 + 1) + 8)
12: 2 × (3 + (1 + 8))
13: (2 - 1) × 8 × 3
14: ((2 - 1) × 8) × 3
15: (2 - 1) × (8 × 3)
16: 2 × (1 + 8 + 3)
17: 2 × ((1 + 8) + 3)
18: 2 × (1 + (8 + 3))
19: (2 - 1) × 3 × 8
20: ((2 - 1) × 3) × 8
21: (2 - 1) × (3 × 8)
22: 2 × (1 + 3 + 8)
23: 2 × ((1 + 3) + 8)
24: 2 × (1 + (3 + 8))
25: (8 - 2) × (3 + 1)
26: (8 - 2) × (1 + 3)
27: (8 × (2 - 1)) × 3
28: 8 × (2 - 1) × 3
29: 8 × ((2 - 1) × 3)
30: (8 ÷ (2 - 1)) × 3
31: 8 ÷ (2 - 1) × 3
32: 8 ÷ ((2 - 1) ÷ 3)
33: 8 × (3 × (2 - 1))
34: 8 × 3 ×(2 - 1)
35: (8 × 3) × (2 - 1)
36: 8 × (3 ÷ (2 - 1))
37: 8 × 3 ÷(2 - 1)