51 乘法 80 等于多少？

51 × 79 = 4029 51 × 81 = 4131 51 × 78 = 3978 51 × 82 = 4182 51 × 83 = 4233 51 × 77 = 3927 51 × 84 = 4284 51 × 76 = 3876 50 × 80 = 4000 52 × 80 = 4160 49 × 80 = 3920 53 × 80 = 4240 48 × 80 = 3840 54 × 80 = 4320 47 × 80 = 3760 55 × 80 = 4400 48 × 85 = 4080 60 × 68 = 4080 68 × 60 = 4080 80 × 51 = 4080 85 × 48 = 4080 22 × 49 = 1078 74 × 34 = 2516 85 × 42 = 3570 70 × 23 = 1610 45 × 78 = 3510 85 × 71 = 6035 20 × 30 = 600 81 × 32 = 2592 99 × 77 = 7623