Mitchell is a big coffee fan, so he always takes care of coffee brewing at the office. Normally he uses $100$ grams of Robusta coffee to prepare $10$ cups of coffee. His friend brings him a packet of Arabica coffee and tells him that he should use $20\%$ more than usual when brewing Arabica coffee. **How many grams of coffee should he use to make a $15$-cup pot of Arabica coffee?** [[☃ input-number 1]] grams