A piece of wire 10 cm long forms an isosceles triangle with a waist length of 3 cm. What is the base length of the isosceles triangle?
一根10厘米长的铁丝做一个腰长3厘米的等腰三角形，这个等腰三角形的底长是多少厘米．
<gadget id="calculator">10 - 3 - 3</gadget>
<output>4</output>

<result>4</result>