Use repeated addition (add the number to itself 15 times), which avoids multiplication entirely

Use MUL AB instruction with B equals 16, which takes 48 clocks but is more reliable than shifts

Use software multiplication algorithm from Practical 26, which is more accurate than hardware

Perform four consecutive left shifts using RL A (4 machine cycles total), since each left shift multiplies by 2 and 2 to the power of 4 equals 16