The base of a parallelogram is 15 cm, and the height is 1/3 of the base. What is the area of the parallelogram in square centimeters?
一个平行四边行的底是15厘米，高是底的(1/3)，这个平行四边形的面积是多少平方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">15 * (1/3)</gadget>
<output>5</output>

<gadget id="calculator">15 * 5</gadget>
<output>75</output>

<result>75</result>