Task: Sentence Expansion
Input (English): For example , a kilometre is one thousand times the length of a metre , but a square kilometre is one million times the area of a square metre .
Output (English): For example , a kilometre is 10 ( a thousand ) times the length of a metre , but a square kilometre is 10 ( 10 , a million ) times the area of a square metre , and a cubic kilometre is 10 ( 10 , a billion ) cubic metres .