Detailed Instructions: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Q: Problem: susan made a block with small cubes of 5 cubic cm volume to make a block 7 small cubes long, 7 small cubes wide and 6 small cubes deep. she realise that she has used more small cubes than she really needed. she realised that she could have glued a fewer number of cubes together ot look like a block with same dimensions, if it were made
Options: ['a. 194', 'b. 195', 'c. 196', 'd. 197', 'e. 198']
A:
a