15 乘法 20 等于多少？

15 × 19 = 285 15 × 21 = 315 15 × 22 = 330 15 × 18 = 270 15 × 23 = 345 15 × 17 = 255 15 × 24 = 360 15 × 16 = 240 14 × 20 = 280 16 × 20 = 320 13 × 20 = 260 17 × 20 = 340 12 × 20 = 240 18 × 20 = 360 11 × 20 = 220 19 × 20 = 380 3 × 100 = 300 4 × 75 = 300 5 × 60 = 300 6 × 50 = 300 10 × 30 = 300 12 × 25 = 300 79 × 13 = 1027 82 × 42 = 3444 56 × 90 = 5040 69 × 67 = 4623 45 × 8 = 360 34 × 21 = 714 31 × 8 = 248 68 × 99 = 6732