Elasticity

Title: Elasticity

Rating: 3/5

After last week's mod 9 sum, this week is a mod 9 product.

The official rules:

• The digits 1 through 9 appear in each row and each column exactly once.
• Digits in each shaded region must multiply to the indicated product (mod 9).   
• Squares with multiple colors contain a number that’s used in the product for adjacent regions of each of those colors.  
• Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.