Calculate the formula according to the meaning of the question:

Minimum value: 3x2x31= 6x31=186.

max:5x3x 3 1 = 15x 3 1 = 465。

So you need at least 186 tablets and at most 465 tablets.

Multiplication operation properties:

Multiply the product of several numbers by a number so that any factor in the product can be multiplied by this number and then multiplied by other numbers. For example: (25×3×9)×4=25×4×3×9=2700.

Multiply a number by the difference between two numbers, and you can multiply the minuend and the minuend by this number respectively, and then subtract the product. For example: (137-125) × 8 =137× 8-125× 8 = 96.