Calculate the formula according to the meaning of the question:

326x9

=326x( 10- 1)

=326x 10+326x 1

=3260-326

=2934

So a * * * can hold 2934 books.

Multiplication operation:

Integer multiplication starts from the unit and multiplies the first factor by the number on each bit of the second factor in turn; Multiply by the number on the second factor, and the last digit of the number will be aligned with the second factor; Add up the numbers multiplied by several times.

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. Multiply a number by the difference between two numbers. You can multiply this number by the minuend and the minuend respectively, and then subtract the product.