Certainly. Let's say you're -- stocking up on supplies at a local shop. Do you go into the shop knowing exactly how many items you are going to buy and how much money they are going to cost, or do you go into that shop with a fixed amount of money in your pocket and then find out how much and how many you can buy with it?
[ continuing, broadly ] Basic arithmetic asks you to solve problems like, "You buy three apples for six gald each. How much have you spent?" But that is a far less realistic problem than, "You have fifty gald. You need to buy three apples, and you aren't sure how much they will cost."