Teacher:Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.
Teacher: Now, understand the problem? Solve this instance: across the river he fell into a hole . to get out he needs to fill it with 823 gallons of water . if the hole initially has 676 gallons how much water does he need to fill it ?
Student:
147