Auto fill subject line for each different product

I am using one contact form-7 version 3.9.3 for my whole website. I am selling 50 kind of different products. How can I set auto fill subject line for each product. This will help me to understand what inquiry is for what product.

I don’t want an empty subject field for customer to write subject by themselves, as most of customer write in subject line like “inquiry for product” etc. This kind of subject is totally helpless to understand what product customer is interested.

Please help me. Thank you in advance.

https://www.ads-software.com/plugins/contact-form-7/