Task: Question Answering
Input (English): Problem: 30 square stone slabs of equal size were needed to cover a floor area of 120 sq . m . find the length of each stone slab ? 
Options: ['a ) 120 cm', 'b ) 200 cm', 'c ) 88 cm', 'd ) 666 cm', 'e ) 776 cm']
Output (English): b