如何用3377算24点

1: (3 + 3 ÷ 7) × 7=24

2: (3 + (3 ÷ 7)) × 7=24

3: (3 ÷ 7 + 3) × 7=24

4: ((3 ÷ 7) + 3) × 7=24

5: 7 × (3 + 3 ÷ 7)=24

6: 7 × (3 + (3 ÷ 7))=24

7: 7 × (3 ÷ 7 + 3)=24

8: 7 × ((3 ÷ 7) + 3)=24