(50 × 2) + (8 × 2)
(50 × 8) + (50 × 2)
(8 × 2) + (25 × 2)
(8 + 2) × (50 + 2)
(10 × 10) + (7 × 10) + (10 × 1) + (7 × 1)
(1 × 1) + (7 × 1) + (1 × 1) + (7 × 1)
(10 × 1) + (7 × 1) + (10 × 1) + (7 × 1)
(10 + 10) × (7 + 10) × (10 + 1) × (7 + 1)
2,000
500
70
7
3
6,000
1,500
210
21
2,573 × 7 = 18,011
2,577 × 3 = 7,731
2,573 × 7 = 7,731
2,587 × 3 = 7,761