How to read the result of outputfile

[xzy789]

When I use “dmesg|tail” to get the result of bandwidth, the result includes 10 numbers. such as: 1 640(36) 2 640(36) 3 640(36) 4 640(36) 5 640(36) 6 640(36) 7 640(36) 8 640(36) 9 640(36) 10 640(36) Should I Accumulate these data to get the final answer(6400=640*10)? Hope to get your answer. Ziyue, Xu Nankai university