它的体积为15×15×15=3375
每个正方体的体积为1×1×1=1 ,2×2×2=8 ,3×3×3=27,4×4×4=64,5×5×5=125,6×6×6=216,7×7×7=343,8×8×8=512
去掉的正方体的体积为1+8+27+64+125+216+343+512=1296
木块剩下3375-1296=2079
它的体积为15×15×15=3375
每个正方体的体积为1×1×1=1 ,2×2×2=8 ,3×3×3=27,4×4×4=64,5×5×5=125,6×6×6=216,7×7×7=343,8×8×8=512
去掉的正方体的体积为1+8+27+64+125+216+343+512=1296
木块剩下3375-1296=2079