Ok, let's solve this step-by-step:
1. First, we have to understand the units we are dealing with. We have the weight of the fruits initially in kilograms (kg) which is 8 kg, and the weight of the fruits eaten by Lina in grams (g) which is 300 g.
2. To make the calculation simpler and to avoid any potential mistakes, it is essential to use the same units. So, we will convert the weight from kilograms to grams. We know that 1 kilogram is equal to 1000 grams. Therefore, 8 kg equals 8000 grams.
3. After the conversion, to find the weight of the fruits left, we subtract the weight of the fruits eaten by Lina from the initial weight of the fruits: 8000 g - 300 g = 7700 g. So, after eating 300 g of fruits, Lina has 7700 g of fruits left.
4. However, we want the weight not only in grams but also in kilograms. Again, we remember that 1 kilogram equals 1000 grams. So, we convert the weight of the remaining fruits in grams back to kilograms, 7700 g is equal to 7.7 kg.
So, to summarize, after eating 300 g of fruits, Lina has 7700 g or 7.7 kg of fruits left.