Handsaws fall into two main categories, rip saws are designed for cutting along the grain of the wood, and crosscut saws are designed to cut across the grain of the wood [Wikipedia]
If a chessboard were to have wheat placed upon each square such that one grain were placed on the first square, two on the second, four on the third, and so on, with 64 squares on a chessboard, then the total number of grains equals 18,446,744,073,709,551
