A rectangular fish pond is 15m long and long (4/5) wide. What is the floor area of this fish pond in m**2.
一个长方形鱼池，长是15m，宽是长的(4/5)，这个鱼池占地面积是多少m**2．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">15 * (4/5)</gadget>
<output>12</output>

<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<result>180</result>