The task is to generate the correct answer for a given math problem.

Problem: what will be the percentage increase in the area of the cube ' s surface if each of the cube ' s edges grows by 20 % ?
44 %

Problem: how many digits are required to number a book containing 240 pages ?
612

Problem: a salesman sold twice as much pears in the afternoon than in the morning . if he sold $ 390 kilograms of pears that day , how many kilograms did he sell in the afternoon ?

260