$\"\"$

The statement is “ $\"\"$ ”

$\"\"$ (Product of two same signs is positive)

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Product of two same signs is positive)

$\"\"$ (Associative property of multiplication: $\"\"$ )

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

The product is 42z.