Front of Fourth: Around the world

2011年9月3日土曜日

I want to go to various places

I want to meet various people

I want to experience a lot

180˚/πrad × 86400=360.9856˚/平均太陽日

360.9856˚/平均太陽日×6378.137=1674.4

1674.4㎞/h