The women of Bethlehem said Ruth was better to Naomi than how many sons?

Answer: Seven

They praised "your daughter-in-law, who loves you and is better to you than seven sons."

“He will renew your life and sustain you in your old age. For your daughter-in-law, who loves you and is better to you than seven sons, has given him birth.””— Ruth 4:15 (BSB)