You will be given a definition of a task first, then some input of the task.
You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ron weighed 2 colored metal balls during a science class . The blue ball weighed 6 pounds and the brown ball weighed 3.12 pounds . If Ron places both balls on the scale at the same time , what will the scale read ?
Output:
9.12