㏒⒉（ 0.4 ）+ ㏒⒉ √2 + ㏒⒉ 10
Log2 0.4 + log2 √2 + log2 10 = log2 (0.4 * √2 * 10) = log2 4√2 = log2 2^5/2 = 5/2