有一块长138米，宽69米的空地，问能设计一个周长几米的田径场？弯道长多少米？直段长多少米？（跑道四周留空地1米，跑道6条，道宽1.22米。要求列出计算式。跑道长度一般为整数。)

A. Value added tax
B. Shipping order
Cable transfer
D. Free on Board
E. Central Business District
F. World Trade Organization
G. Pay on delivery
H. Letter of Credit
I. Gross Domestic Product
J. Balance of trade
K. Wholly Foreign-owned Enterprises
L. Consumer Price Index
M. Cost, Insurance and Freight
N. Greenwich Mean Time
O. Bunker Surcharge