He invented a system of latitude and longitude . He was the first person to calculate the circumference of the earth by using a measuring system using stades , or the length of stadiums during that time period -LRB- with remarkable accuracy -RRB- .
He was the first person to calculate the circumference of the Earth -LRB- with remarkable accuracy -RRB- , and he invented a system of latitude and longitude .
He was the first person to calculate the circumference of the Earth -LRB- with remarkable accuracy -RRB- , and he invented a system of latitude and longitude .
より簡単な表現に変更します: He invented a system of latitude and longitude . He was the first person to calculate the circumference of the earth by using a measuring system using stades , or the length of stadiums during that time period -LRB- with remarkable accuracy -RRB- . 出力: