4124这么得到24

1: (4 + 1 × 2) × 4
2: (4 + (1 × 2)) × 4
3: (4 - 1) × 2 × 4
4: ((4 - 1) × 2) × 4
5: (4 - 1) × (2 × 4)
6: (4 × 1 + 2) × 4
7: ((4 × 1) + 2) × 4
8: 4 × (1 × 2 + 4)
9: 4 × ((1 × 2) + 4)
10: 4 × (1 × (2 + 4))
11: 4 × 1 ×(2 + 4)
12: (4 × 1) × (2 + 4)
13: (4 ÷ 1 + 2) × 4
14: ((4 ÷ 1) + 2) × 4
15: 4 ÷ 1 ×(2 + 4)
16: (4 ÷ 1) × (2 + 4)
17: 4 ÷ (1 ÷ (2 + 4))
18: (4 - 1) × 4 × 2
19: ((4 - 1) × 4) × 2
20: (4 - 1) × (4 × 2)
21: 4 × (1 × 4 + 2)
22: 4 × ((1 × 4) + 2)
23: 4 × (1 × (4 + 2))
24: 4 × 1 ×(4 + 2)
25: (4 × 1) × (4 + 2)
26: 4 ÷ 1 ×(4 + 2)
27: (4 ÷ 1) × (4 + 2)
28: 4 ÷ (1 ÷ (4 + 2))
29: (4 + 2) × 1 × 4
30: (4 + 2 × 1) × 4
31: ((4 + 2) × 1) × 4
32: (4 + (2 × 1)) × 4
33: (4 + 2) × (1 × 4)
34: (4 + 2) ÷ 1 × 4
35: (4 + 2 ÷ 1) × 4
36: ((4 + 2) ÷ 1) × 4
37: (4 + (2 ÷ 1)) × 4
38: