He is fair and square in his dealings. Here the idiom 'fair and square' refers to -

• He is fair and square in his dealings. Here the idiom 'fair and square' refers to - honestly and straightforwardly• Fair and squareEnglish Meaning: with absolute accuracy / honestly and straightforwardly.Bangla Meaning: পরিপূর্ণভাবে ন্যায্য / সততা এবং সরলতা / সৎ ও সরলEx. Sentence: He is fair and square in his dealings.Bangla Meaning: সে সততা ও নিষ্ঠার সাথে ব্যবসা করে৷Source: Website Lecture.