8' x 10' 8' x 10' over 9' x12' over 9' x12' 2' to 5' round/square. 2' to 5' round/square. 6' to 9' round/square. 6' to 9' round/square. Over 9' round/square. Multiply 2/3 by 9/8. 2/3 x 9/8 - Multiplying Fraction. Use this calculator to add, subtract, multiply and divide fractions.