A long time ago，there was a king in India．The king's 1 game was chess．
One day，a wise old man 2 to the palace and the king challenged him to 3 game．The king promised the old man．"You can4 any prize if you win the game．"
The old man5 ， "If I win the game，I'd like one grain of6for the first square of the chessboard，two for the second，four for the 7 ， and then double the amount for each of the 8of the squares．"
"Is that all？"asked the king，"Wouldn't you like gold or silver9？"
"No，just rice．"replied the old man．
The king and the old man played the game 10 a long time．Finally，the old man won．11 the king ordered his men to collect a bag of rice．He12 one grain on the first square，two on the second，and so on．The king quickly realized the13—even with all the rice in the country，he would14 not have enough rice to put on all the 15 ．
