The base area of a cuboid is (3/4)a square decimeters, and the height is (4/5)b decimeters. It is known that a and b are reciprocals of each other. What is the volume of this cuboid?
一个长方体的底面积(3/4)a平方分米，高是(4/5)b分米，已知a与b互为倒数，这个长方体的体积是多少立方分米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>