How many meters of iron wire are needed to make an equilateral triangle frame whose side length is (1/3) meter. (neglected at joints)
做一个边长为(1/3)米的等边三角形框架，需要铁丝多少米．(接头处忽略不计)
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<result>1</result>