Given the task definition and input, reply with output. You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: The grasshopper and the frog had a jumping contest. The grasshopper jumped 9 inches and the frog jumped 12 inches. 

 Question: How much farther did the frog jump than the grasshopper?

3