An isosceles triangle, the ratio of the two sides is 2:5, if one side of this isosceles triangle is 10 cm, then how many cm is its base
一个等腰三角形，两条边的比是2：5，如果这个等腰三角形的一条腰是10厘米，那么它的底是多少厘米
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">10 * (2/5)</gadget>
<output>4</output>

<result>4</result>