Uncle Wang wants to use wooden strips to make an equilateral triangle model with a side length of 30 cm. Please do the calculation for Uncle Wang, what is the minimum length of wooden sticks?
王叔叔要用木条做一个边长为30厘米的等边三角形模型．请你帮王叔叔算一算，最少要用多长的木条？
<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<result>90</result>