A wire can just form a rectangle with a length of 9 decimeters and a width of 6 decimeters. How long is this wire in centimeters?
一根铁丝刚好可以围成一个长是9分米、宽是6分米的长方形，这根铁丝长多少厘米？
<gadget id="calculator">9 + 6</gadget>
<output>15</output>

<gadget id="calculator">15 * 2 * 10</gadget>
<output>300</output>

<result>300</result>