This ruler is very useful, because the division of the scale begins from the edge of the ruler so that one can measure things with accuracy.
ご質問ありがとうございます。
"This ruler is very useful,"＝「この定規はとても便利である」
"because the division of the scale begins from the edge of the ruler"＝「なぜかというと、メモリが定規の端から始まっている」
"so that one can measure things with accuracy."＝「それによって物を正確に測れるから。」
ご参考に。
アメリカ合衆国 
