21 乘法 13 等于多少？

21 × 12 = 252 21 × 14 = 294 21 × 11 = 231 21 × 15 = 315 21 × 10 = 210 21 × 16 = 336 21 × 17 = 357 21 × 9 = 189 20 × 13 = 260 22 × 13 = 286 19 × 13 = 247 23 × 13 = 299 24 × 13 = 312 18 × 13 = 234 25 × 13 = 325 17 × 13 = 221 3 × 91 = 273 7 × 39 = 273 13 × 21 = 273 39 × 7 = 273 91 × 3 = 273 89 × 40 = 3560 100 × 45 = 4500 83 × 86 = 7138 45 × 37 = 1665 33 × 46 = 1518 18 × 94 = 1692 32 × 80 = 2560 6 × 25 = 150 66 × 70 = 4620