Both sides of the expression below are equal.

(6 x 10) x 7 = 6 x (10 x 7)

A. True

B. False

A. TRUE

It's Associative Property.

The "Associative Property (Laws) " say that it doesn't matter how we group the numbers (i. e. which we calculate first)

(a * b) * c = a * (b * c)

(6 * 10) * 7 = 6 * (10 * 7)

L = 60 * 7 = 420

R = 6 * 70 = 420

L = R