With more than three numbers, there can be many ways to do the multiplication. For example, with 4 numbers one of the ways is <math>2 \times 3 \times 4 \times 5 = ((2 \times 3) \times 4 )\times 5 = (6 \times 4 )\times 5 = 24\times 5 = 120</math>. | With more than three numbers, there can be many ways to do the multiplication. For example, with 4 numbers one of the ways is <math>2 \times 3 \times 4 \times 5 = ((2 \times 3) \times 4 )\times 5 = (6 \times 4 )\times 5 = 24\times 5 = 120</math>. |