The length of A wooden strip is 9 cm, and the length of B wooden strip is (7/15) of A wooden strip. An isosceles triangle is formed by three of these two kinds of wooden strips. What is the perimeter of an isosceles triangle in centimeters.
甲木条长9厘米，乙木条长是甲木条的(7/15)，用这两种木条三根围成一个等腰三解形，等腰三角形的周长是多少厘米．
<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">9 * (7/15)</gadget>
<output>21/5 = around 4.2</output>

<gadget id="calculator">9 + 9 + (21/5)</gadget>
<output>111/5 = around 22.2</output>

<result>111/5 = around 22.2</result>