16 times 21 is 336. In symbols: 16 × 21 = 336, and 21 × 16 = 336 too.
16 × 21 means adding 16 to itself 21 times: that is 21 copies of 16, which add up to 336.
16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, ... (keep going to the 21th multiple). The 21th multiple of 16 is 336.
16 × 21 = 16 × 20 + 16 × 1 = 320 + 16 = 336.
Halve one number and double the other: 16 × 21 = 8 × 42 = 336.
336 ÷ 16 = 21
336 ÷ 21 = 16
336 is even. Prime factorization: 2 × 2 × 2 × 2 × 3 × 7.
| Multiplication | Answer |
|---|---|
| 15 × 21 | 315 |
| 17 × 21 | 357 |
| 16 × 20 | 320 |
| 16 × 22 | 352 |
| 16 × 23 | 368 |
| 16 × 19 | 304 |
| 18 × 21 | 378 |
| 14 × 21 | 294 |
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.