1. The problem states that 1400g of flour is used to make a batch of shortbread biscuits. We need to find out how many grams of butter is used for this batch. 2. Typically, shortbread has a ratio of 2:1:1 by weight for flour, butter, and sugar respectively, meaning for every 2 parts flour, there is 1 part butter. 3. Given flour = 1400g corresponds to 2 parts, butter corresponds to 1 part. 4. To find the weight of butter, we divide the amount of flour by 2: $$ \text{Butter} = \frac{1400}{2} = 700 \text{ grams} $$ 5. So, 700 grams of butter is used for the batch of shortbread biscuits.