14. A restaurant prepares \( 4,35 \mathrm{~kg} \) of dough per batch. How much dough is prepared in 18,9 batches? 15. A mobile phone weighs \( 0,275 \mathrm{~kg} \). What is the total weight of 26,5 such phones?

Did you know that the art of making dough dates back thousands of years? Ancient civilizations like the Egyptians were some of the first to create baked bread from basic ingredients like flour and water. They would mix the dough by hand or with rudimentary tools, setting the stage for the baking traditions we cherish today. In the world of mobile phones, the weight of modern devices often combines various materials such as metal, glass, and plastic, leading to faster innovations in design. Interestingly, advancements in lightweight materials have allowed for sleeker designs while maintaining functionality. This not only enhances portability but also the overall user experience!